Ajouter à n le 2e nombre qui ne divise pas n.

Itérer.

 

 

 

Le message suivant fut envoyé par l’auteur aux listes MathFun et SeqFan, fin juin 2008

(traduction juste après -- je crois que j’ai confondu divider et divisor) :

 

__________

 

Hello MathFun & SeqFans,

 

Rule:

 

< Add to n its second smallest non-divider. Loop. >

 

Let's start with n = 7, for instance

 

Is 1 a divider of 7? yes

   2                 no

   3                 no --> then new n = 7+3 = 10

 

Is 1 a divider of 10? yes

   2                  yes

   3                  no

   4                  no --> then new n =10+4= 14

 

Is 1 a divider of 14? yes

   2                  yes

   3                  no

   4                  no --> then new n =14+4= 18

 

Is 1 a divider of 18? yes

   2                  yes

   3                  yes

   4                  no

   5                  no --> then new n =18+5= 23

 

... etc.

 

Sequence starting with 7 is: 7,10,14,18,23,...

 

Sequence starting with 1 is: 1,4,9,13,16,21,...  [not in the OEIS]

Sequence starting with 2 is: 2,6,11,14,18,23,... [merges with "7-seq"]

Sequence starting with 3 is: 3,7,10,14,...       [merges with "7-seq"]

Sequence starting with 5 is: 5,8,13,16,...       [merges with "1-seq"]

etc.

 

We might map those sequences like this:

 

 

1--4--9---13--16--21--25--28--33--37--40 ...

          |                       |

   5--8---+               29--32--+   41 ...

                                  |

2--6--11--14--18--23--26--30------+

          |           |

3--7--10--+   17--20--+           36--43 ...

                      |               |

          12--19--22--+           39--+

              |                      

          15--+       24--31--34--38--42 ...

                          |       |

                      27--+   35--+

 

 

What number starts the longest sequence containing 2008?

Best,

É.

---

P.-S.

This rule is not very productive:  < Add to n its first smallest non-divider. Loop. >

What about: < Add to n its third smallest non-divider. Loop. >

Etc.

 

__________

 

On a compris, il s’agit d’ajouter à un nombre n le deuxième nombre qui ne divise pas n, puis d’itérer.

(C’est la loi dite « D2 » selon la terminologie adoptée par Jacques Tramu, lequel a travaillé sur ces suites.)

 

Prenons 7 par exemple :

 

   1 divise-t-il 7 ? oui

   2                 non

   3                 non --> alors le nouveau n = 7+3 = 10

 

   1 divise-t-il 10 ? oui

   2                  oui

   3                  non

   4                  non --> alors le nouveau n =10+4= 14

 

   1 divise-t-il 14 ? oui

   2                  oui

   3                  non

   4                  non --> alors le nouveau n =14+4= 18

 

   1 divise-t-il 18 ? oui

   2                  oui

   3                  oui

   4                  non

   5                  non --> alors le nouveau n =18+5= 23

 

... etc.

 

La suite commençant par 7 [baptisons-la D2(7)] est donc :

 

D2(7) = 7, 10, 14, 18, 23, 26, 30, 37, 40, 46, 50...

 

La suite commençant par 1, [ou D2(1)], est :

 

D2(1) = 1, 4, 9, 13, 16, 21, 25, 28, 33, 37, 40, 46, 50...

 

Les termes soulignés dans D2(1) et D2(7) sont identiques à partir d’un certain point : on dit de ces deux suites qu’elles confluent en 37.

 

Voici 500 termes itérés de D2(1) :

 

D2(1) = 1, 4, 9, 13, 16, 21, 25, 28, 33, 37, 40, 46, 50, 54, 59, 62, 66, 71, 74, 78, 83, 86, 90, 97, 100, 106, 110, 114, 119, 122, 126, 131, 134, 138, 143, 146, 150, 157, 160, 166, 170, 174, 179, 182, 186, 191, 194, 198, 203, 206, 210, 218, 222, 227, 230, 234, 239, 242, 246, 251, 254, 258, 263, 266, 270, 277, 280, 286, 290, 294, 299, 302, 306, 311, 314, 318, 323, 326, 330, 337, 340, 346, 350, 354, 359, 362, 366, 371, 374, 378, 383, 386, 390, 397, 400, 406, 410, 414, 419, 422, 426, 431, 434, 438, 443, 446, 450, 457, 460, 466, 470, 474, 479, 482, 486, 491, 494, 498, 503, 506, 510, 517, 520, 526, 530, 534, 539, 542, 546, 551, 554, 558, 563, 566, 570, 577, 580, 586, 590, 594, 599, 602, 606, 611, 614, 618, 623, 626, 630, 638, 642, 647, 650, 654, 659, 662, 666, 671, 674, 678, 683, 686, 690, 697, 700, 706, 710, 714, 719, 722, 726, 731, 734, 738, 743, 746, 750, 757, 760, 766, 770, 774, 779, 782, 786, 791, 794, 798, 803, 806, 810, 817, 820, 826, 830, 834, 839, 842, 846, 851, 854, 858, 863, 866, 870, 877, 880, 886, 890, 894, 899, 902, 906, 911, 914, 918, 923, 926, 930, 937, 940, 946, 950, 954, 959, 962, 966, 971, 974, 978, 983, 986, 990, 997, 1000, 1006, 1010, 1014, 1019, 1022, 1026, 1031, 1034, 1038, 1043, 1046, 1050, 1058, 1062, 1067, 1070, 1074, 1079, 1082, 1086, 1091, 1094, 1098, 1103, 1106, 1110, 1117, 1120, 1126, 1130, 1134, 1139, 1142, 1146, 1151, 1154, 1158, 1163, 1166, 1170, 1177, 1180, 1186, 1190, 1194, 1199, 1202, 1206, 1211, 1214, 1218, 1223, 1226, 1230, 1237, 1240, 1246, 1250, 1254, 1259, 1262, 1266, 1271, 1274, 1278, 1283, 1286, 1290, 1297, 1300, 1306, 1310, 1314, 1319, 1322, 1326, 1331, 1334, 1338, 1343, 1346, 1350, 1357, 1360, 1366, 1370, 1374, 1379, 1382, 1386, 1391, 1394, 1398, 1403, 1406, 1410, 1417, 1420, 1426, 1430, 1434, 1439, 1442, 1446, 1451, 1454, 1458, 1463, 1466, 1470, 1478, 1482, 1487, 1490, 1494, 1499, 1502, 1506, 1511, 1514, 1518, 1523, 1526, 1530, 1537, 1540, 1546, 1550, 1554, 1559, 1562, 1566, 1571, 1574, 1578, 1583, 1586, 1590, 1597, 1600, 1606, 1610, 1614, 1619, 1622, 1626, 1631, 1634, 1638, 1643, 1646, 1650, 1657, 1660, 1666, 1670, 1674, 1679, 1682, 1686, 1691, 1694, 1698, 1703, 1706, 1710, 1717, 1720, 1726, 1730, 1734, 1739, 1742, 1746, 1751, 1754, 1758, 1763, 1766, 1770, 1777, 1780, 1786, 1790, 1794, 1799, 1802, 1806, 1811, 1814, 1818, 1823, 1826, 1830, 1837, 1840, 1846, 1850, 1854, 1859, 1862, 1866, 1871, 1874, 1878, 1883, 1886, 1890, 1898, 1902, 1907, 1910, 1914, 1919, 1922, 1926, 1931, 1934, 1938, 1943, 1946, 1950, 1957, 1960, 1966, 1970, 1974, 1979, 1982, 1986, 1991, 1994, 1998, 2003, 2006, 2010, 2017, 2020, 2026, 2030, 2034, 2039, 2042, 2046, 2051, 2054, 2058, 2063, 2066, 2070, 2077, 2080, 2086, 2090, 2094, 2099, 2102, 2106, 2111, 2114, 2118, 2123, 2126, 2130, 2137, 2140, 2146, 2150, 2154, 2159, 2162, 2166, 2171, 2174, 2178, 2183, 2186, 2190, 2197,...

 

 

On a vu que certaines suites finissent par mettre leurs pas dans ceux d’une suite existant déjà. Voici le tableau des suites générées par des nombres ne figurant pas plus haut dans le tableau lui-même (l’astérisque indique le point de confluence d’un début de suite avec une suite existant déjà — merci encore à Jacques T.) :

 

D2(1) = 1, 4, 9, 13, 16, 21, 25, 28, 33, 37, 40, 46, 50, 54, 59, 62, 66, 71, 74, 78, 83, 86, 90, 97, 100, ...

D2(2) = 2, 6, 11, 14, 18, 23, 26, 30, 37*

D2(3) = 3, 7, 10, 14*

D2(5) = 5, 8, 13*

D2(12) = 12, 19, 22, 26*

D2(15) = 15, 19*

D2(17) = 17, 20, 26*

D2(24) = 24, 31, 34, 38, 42, 47, 50*

D2(27) = 27, 31*

D2(29) = 29, 32, 37*

D2(35) = 35, 38*

D2(36) = 36, 43, 46*

D2(39) = 39, 43*

D2(41) = 41, 44, 49, 52, 57, 61, 64, 69, 73, 76, 81, 85, 88, 93, 97*

D2(45) = 45, 49*

D2(48) = 48, 55, 58, 62*

D2(51) = 51, 55*

D2(53) = 53, 56, 61*

D2(60) = 60, 68, 73*

D2(63) = 63, 67, 70, 74*

D2(65) = 65, 68*

D2(72) = 72, 79, 82, 86*

D2(75) = 75, 79*

D2(77) = 77, 80, 86*

D2(84) = 84, 92, 97*

D2(87) = 87, 91, 94, 98, 102, 107, 110*

D2(89) = 89, 92*

D2(95) = 95, 98*

D2(96) = 96, 103, 106*

D2(99) = 99, 103*

D2(101) = 101, 104, 109, 112, 117, 121, 124, 129, 133, 136, 141, 145, 148, 153, 157*

D2(105) = 105, 109*

D2(108) = 108, 115, 118, 122*

D2(111) = 111, 115*

D2(113) = 113, 116, 121*

D2(120) = 120, 129*

D2(123) = 123, 127, 130, 134*

D2(125) = 125, 128, 133*

D2(132) = 132, 139, 142, 146*

D2(135) = 135, 139*

D2(137) = 137, 140, 146*

D2(144) = 144, 151, 154, 158, 162, 167, 170*

D2(147) = 147, 151*

D2(149) = 149, 152, 157*

D2(155) = 155, 158*

D2(156) = 156, 163, 166*

D2(159) = 159, 163*

D2(161) = 161, 164, 169, 172, 177, 181, 184, 189, 193, 196, 201, 205, 208, 213, 217, 220, 226, 230*

D2(165) = 165, 169*

D2(168) = 168, 177*

D2(171) = 171, 175, 178, 182*

D2(173) = 173, 176, 181*

D2(180) = 180, 188, 193*

D2(183) = 183, 187, 190, 194*

D2(185) = 185, 188*

D2(192) = 192, 199, 202, 206*

D2(195) = 195, 199*

D2(197) = 197, 200, 206*

D2(204) = 204, 211, 214, 218*

D2(207) = 207, 211*

D2(209) = 209, 212, 217*

D2(215) = 215, 218*

D2(216) = 216, 223, 226*

D2(219) = 219, 223*

D2(221) = 221, 224, 229, 232, 237, 241, 244, 249, 253, 256, 261, 265, 268, 273, 277*

D2(225) = 225, 229*

D2(228) = 228, 235, 238, 242*

D2(231) = 231, 235*

D2(233) = 233, 236, 241*

D2(240) = 240, 249*

D2(243) = 243, 247, 250, 254*

D2(245) = 245, 248, 253*

D2(252) = 252, 260, 266*

D2(255) = 255, 259, 262, 266*

D2(257) = 257, 260*

D2(264) = 264, 271, 274, 278, 282, 287, 290*

D2(267) = 267, 271*

D2(269) = 269, 272, 277*

D2(275) = 275, 278*

D2(276) = 276, 283, 286*

D2(279) = 279, 283*

D2(281) = 281, 284, 289, 292, 297, 301, 304, 309, 313, 316, 321, 325, 328, 333, 337*

D2(285) = 285, 289*

D2(288) = 288, 295, 298, 302*

D2(291) = 291, 295*

D2(293) = 293, 296, 301*

D2(300) = 300, 308, 313*

D2(303) = 303, 307, 310, 314*

D2(305) = 305, 308*

D2(312) = 312, 319, 322, 326*

D2(315) = 315, 319*

D2(317) = 317, 320, 326*

D2(324) = 324, 331, 334, 338, 342, 347, 350*

D2(327) = 327, 331*

D2(329) = 329, 332, 337*

D2(335) = 335, 338*

D2(336) = 336, 345, 349, 352, 357, 361, 364, 369, 373, 376, 381, 385, 388, 393, 397*

D2(339) = 339, 343, 346*

D2(341) = 341, 344, 349*

D2(348) = 348, 355, 358, 362*

D2(351) = 351, 355*

D2(353) = 353, 356, 361*

D2(360) = 360, 371*

D2(363) = 363, 367, 370, 374*

D2(365) = 365, 368, 373*

D2(372) = 372, 379, 382, 386*

D2(375) = 375, 379*

D2(377) = 377, 380, 386*

D2(384) = 384, 391, 394, 398, 402, 407, 410*

D2(387) = 387, 391*

D2(389) = 389, 392, 397*

D2(395) = 395, 398*

D2(396) = 396, 403, 406*

D2(399) = 399, 403*

D2(401) = 401, 404, 409, 412, 417, 421, 424, 429, 433, 436, 441, 445, 448, 453, 457*

D2(405) = 405, 409*

D2(408) = 408, 415, 418, 422*

D2(411) = 411, 415*

D2(413) = 413, 416, 421*

D2(420) = 420, 429*

D2(423) = 423, 427, 430, 434*

D2(425) = 425, 428, 433*

D2(432) = 432, 439, 442, 446*

D2(435) = 435, 439*

D2(437) = 437, 440, 446*

D2(444) = 444, 451, 454, 458, 462, 467, 470*

D2(447) = 447, 451*

D2(449) = 449, 452, 457*

D2(455) = 455, 458*

D2(456) = 456, 463, 466*

D2(459) = 459, 463*

D2(461) = 461, 464, 469, 472, 477, 481, 484, 489, 493, 496, 501, 505, 508, 513, 517*

D2(465) = 465, 469*

D2(468) = 468, 475, 478, 482*

D2(471) = 471, 475*

D2(473) = 473, 476, 481*

D2(480) = 480, 489*

D2(483) = 483, 487, 490, 494*

D2(485) = 485, 488, 493*

D2(492) = 492, 499, 502, 506*

D2(495) = 495, 499*

D2(497) = 497, 500, 506*

D2(504) = 504, 514, 518, 522, 527, 530*

D2(507) = 507, 511, 514*

D2(509) = 509, 512, 517*

D2(515) = 515, 518*

D2(516) = 516, 523, 526*

D2(519) = 519, 523*

D2(521) = 521, 524, 529, 532, 537, 541, 544, 549, 553, 556, 561, 565, 568, 573, 577*

D2(525) = 525, 529*

D2(528) = 528, 535, 538, 542*

D2(531) = 531, 535*

D2(533) = 533, 536, 541*

D2(540) = 540, 548, 553*

D2(543) = 543, 547, 550, 554*

D2(545) = 545, 548*

D2(552) = 552, 559, 562, 566*

D2(555) = 555, 559*

D2(557) = 557, 560, 566*

D2(564) = 564, 571, 574, 578, 582, 587, 590*

D2(567) = 567, 571*

D2(569) = 569, 572, 577*

D2(575) = 575, 578*

D2(576) = 576, 583, 586*

D2(579) = 579, 583*

D2(581) = 581, 584, 589, 592, 597, 601, 604, 609, 613, 616, 621, 625, 628, 633, 637, 640, 646, 650*

D2(585) = 585, 589*

D2(588) = 588, 596, 601*

D2(591) = 591, 595, 598, 602*

D2(593) = 593, 596*

D2(600) = 600, 609*

D2(603) = 603, 607, 610, 614*

D2(605) = 605, 608, 613*

D2(612) = 612, 619, 622, 626*

D2(615) = 615, 619*

D2(617) = 617, 620, 626*

D2(624) = 624, 631, 634, 638*

D2(627) = 627, 631*

D2(629) = 629, 632, 637*

D2(635) = 635, 638*

D2(636) = 636, 643, 646*

D2(639) = 639, 643*

D2(641) = 641, 644, 649, 652, 657, 661, 664, 669, 673, 676, 681, 685, 688, 693, 697*

D2(645) = 645, 649*

D2(648) = 648, 655, 658, 662*

D2(651) = 651, 655*

D2(653) = 653, 656, 661*

D2(660) = 660, 668, 673*

D2(663) = 663, 667, 670, 674*

D2(665) = 665, 668*

D2(672) = 672, 681*

D2(675) = 675, 679, 682, 686*

D2(677) = 677, 680, 686*

D2(684) = 684, 691, 694, 698, 702, 707, 710*

D2(687) = 687, 691*

D2(689) = 689, 692, 697*

D2(695) = 695, 698*

D2(696) = 696, 703, 706*

D2(699) = 699, 703*

D2(701) = 701, 704, 709, 712, 717, 721, 724, 729, 733, 736, 741, 745, 748, 753, 757*

D2(705) = 705, 709*

D2(708) = 708, 715, 718, 722*

D2(711) = 711, 715*

D2(713) = 713, 716, 721*

D2(720) = 720, 731*

D2(723) = 723, 727, 730, 734*

D2(725) = 725, 728, 733*

D2(732) = 732, 739, 742, 746*

D2(735) = 735, 739*

D2(737) = 737, 740, 746*

D2(744) = 744, 751, 754, 758, 762, 767, 770*

D2(747) = 747, 751*

D2(749) = 749, 752, 757*

D2(755) = 755, 758*

D2(756) = 756, 764, 769, 772, 777, 781, 784, 789, 793, 796, 801, 805, 808, 813, 817*

D2(759) = 759, 763, 766*

D2(761) = 761, 764*

D2(765) = 765, 769*

D2(768) = 768, 775, 778, 782*

D2(771) = 771, 775*

D2(773) = 773, 776, 781*

D2(780) = 780, 788, 793*

D2(783) = 783, 787, 790, 794*

D2(785) = 785, 788*

D2(792) = 792, 799, 802, 806*

D2(795) = 795, 799*

D2(797) = 797, 800, 806*

D2(804) = 804, 811, 814, 818, 822, 827, 830*

D2(807) = 807, 811*

D2(809) = 809, 812, 817*

D2(815) = 815, 818*

D2(816) = 816, 823, 826*

D2(819) = 819, 823*

D2(821) = 821, 824, 829, 832, 837, 841, 844, 849, 853, 856, 861, 865, 868, 873, 877*

D2(825) = 825, 829*

D2(828) = 828, 835, 838, 842*

D2(831) = 831, 835*

D2(833) = 833, 836, 841*

D2(840) = 840, 851*

D2(843) = 843, 847, 850, 854*

D2(845) = 845, 848, 853*

D2(852) = 852, 859, 862, 866*

D2(855) = 855, 859*

D2(857) = 857, 860, 866*

D2(864) = 864, 871, 874, 878, 882, 887, 890*

D2(867) = 867, 871*

D2(869) = 869, 872, 877*

D2(875) = 875, 878*

D2(876) = 876, 883, 886*

D2(879) = 879, 883*

D2(881) = 881, 884, 889, 892, 897, 901, 904, 909, 913, 916, 921, 925, 928, 933, 937*

D2(885) = 885, 889*

D2(888) = 888, 895, 898, 902*

D2(891) = 891, 895*

D2(893) = 893, 896, 901*

D2(900) = 900, 908, 913*

D2(903) = 903, 907, 910, 914*

D2(905) = 905, 908*

D2(912) = 912, 919, 922, 926*

D2(915) = 915, 919*

D2(917) = 917, 920, 926*

D2(924) = 924, 932, 937*

D2(927) = 927, 931, 934, 938, 942, 947, 950*

D2(929) = 929, 932*

D2(935) = 935, 938*

D2(936) = 936, 943, 946*

D2(939) = 939, 943*

D2(941) = 941, 944, 949, 952, 957, 961, 964, 969, 973, 976, 981, 985, 988, 993, 997*

D2(945) = 945, 949*

D2(948) = 948, 955, 958, 962*

D2(951) = 951, 955*

D2(953) = 953, 956, 961*

D2(960) = 960, 969*

D2(963) = 963, 967, 970, 974*

D2(965) = 965, 968, 973*

D2(972) = 972, 979, 982, 986*

D2(975) = 975, 979*

D2(977) = 977, 980, 986*

D2(984) = 984, 991, 994, 998, 1002, 1007, 1010*

D2(987) = 987, 991*

D2(989) = 989, 992, 997*

D2(995) = 995, 998*

D2(996) = 996, 1003, 1006*

D2(999) = 999, 1003*

D2(1001) = 1001, 1004, 1009, 1012, 1017, 1021, 1024, 1029, 1033, 1036, 1041, 1045, 1048, 1053, 1057, 1060, 1066, 1070*

...

D2(1961) = 1961, 1964, 1969, 1972, 1977, 1981, 1984, 1989, 1993, 1996, 2001, 2005, 2008, ...

 

 

On pourrait dessiner un début de carte des suites D2(n) (la couleur jaune portée sur certains nombres est expliquée plus bas) :

 

 

1--4--9---13--16--21--25--28--33--37--40 ...

          |                       |

   5--8---+               29--32--+   41 ...

                                  |

2--6--11--14--18--23--26--30------+

          |           |

3--7--10--+   17--20--+           36--43 ...

                      |               |

          12--19--22--+           39--+

              |                      

          15--+       24--31--34--38--42 ...

                          |       |

                      27--+   35--+

 

 

Plusieurs questions se posent :

 

- Peut-on calculer le millième terme d’une suite D2 sans en calculer tous les autres ?

- On se donne un nombre (2008, par exemple) : peut-on trouver le premier terme de la plus longue suite aboutissant à ce nombre ? [Jacques T. a calculé que 2008 ne faisait partie que d’une seule suite D2 — celle qui commence par 1961 : D2(1961) = 1961, 1964, 1969, 1972, 1977, 1981, 1984, 1989, 1993, 1996, 2001, 2005, 2008,...]

- Certains nombres n’ont pas de prédécesseur, ce sont ceux qui ouvrent une nouvelle suite D2 (ils sont surlignés de jaune sur la carte ci-dessus) ; à quelle loi obéissent ces nombres ?

- Qu’en est-il des nombres qui ont un seul prédécesseur, de ceux qui en ont exactement deux, de ceux qui en ont exactement trois, etc. ? (13 a deux prédécesseurs sur la carte des suites D2, ce sont 8 et 9 ; 37 a exactement trois prédécesseurs : 30, 32 et 33)

 

Jacques T. a calculé la série des nombres D2 qui n’ont pas de prédécesseur (cette suite est composée du premier terme de chaque suite du long tableau vertical « avec astérisque », plus haut) :

 

AucunPrédécesseur(D2) = 1, 2, 3, 5, 12, 15, 17, 24, 27, 29, 35, 36, 39, 41, 45, 48, 51, 53, 60, 63, 65, 72, 75, 77, 84, 87, 89, 95, 96, 99, 101, 105, 108, 111, 113, 120, 123, 125, 132, 135, 137, 144, 147, 149, 155, 156, 159, 161, 165, 168, 171, 173, 180, 183, 185, 192, 195, 197, 204, 207, 209, 215, 216, 219, 221, 225, 228, 231, 233, 240, 243, 245, 252, 255, 257, 264, 267, 269, 275, 276, 279, 281, 285, 288, 291, 293, 300, 303, 305, 312, 315, 317, 324, 327, 329, 335, 336, 339, 341, 348, 351, 353, 360, 363, 365, 372, 375, 377, 384, 387, 389, 395, 396, 399, 401, 405, 408, 411, 413, 420, 423, 425, 432, 435, 437, 444, 447, 449, 455, 456, 459, 461, 465, 468, 471, 473, 480, 483, 485, 492, 495, 497, 504, 507, 509, 515, 516, 519, 521, 525, 528, 531, 533, 540, 543, 545, 552, 555, 557, 564, 567, 569, 575, 576, 579, 581, 585, 588, 591, 593, 600, 603, 605, 612, 615, 617, 624, 627, 629, 635, 636, 639, 641, 645, 648, 651, 653, 660, 663, 665, 672, 675, 677, 684, 687, 689, 695, 696, 699, 701, 705, 708, 711, 713, 720, 723, 725, 732, 735, 737, 744, 747, 749, 755, 756, 759, 761, 765, 768, 771, 773, 780, 783, 785, 792, 795, 797, 804, 807, 809, 815, 816, 819, 821, 825, 828, 831, 833, 840, 843, 845, 852, 855, 857, 864, 867, 869, 875, 876, 879, 881, 885, 888, 891, 893, 900, 903, 905, 912, 915, 917, 924, 927, 929, 935, 936, 939, 941, 945, 948, 951, 953, 960, 963, 965, 972, 975, 977, 984, 987, 989, 995, 996, 999, 1001, ...

 

 

Voici le début de la suite commençant par 1 et obéissant à la règle D3 (« Ajouter à n le 3e nombre qui ne divise pas n »), merci à Nicolas Graner pour ses calculs :

 

D3(1) = 1, 5, 9, 14, 19, 23, 27, 32, 38, 43, 47, 51, 56, 62, 67, 71, 75, 81, 86, 91, 95, 99, 104, 110, 116, 122, 127, 131, 135, 141, 146, 151, 155, 159, 164, 170, 176, 182, 187, 191, 195, 201, 206, 211, 215, 219, 224, 230, 236, 242, 247, 251, 255, 261, 266, 271, 275, 279, 284, 290, 296, 302, 307, 311, 315, 321, 326, 331, 335, 339, 344, 350, 356, 362, 367, 371, 375, 381, 386, 391, 395, 399, 404, 410, 416, 422, 427, 431, 435, 441, 446, 451, 455, 459, 464, 470, 476, 482, 487, 491, 495, 501, 506, 511, 515, 519, 524, 530, 536, 542, 547, 551, 555, 561, 566, 571, 575, 579, 584, 590, 596, 602, 607, 611, 615, 621, 626, 631, 635, 639, 644, 650, 656, 662, 667, 671, 675, 681, 686, 691, 695, 699, 704, 710, 716, 722, 727, 731, 735, 741, 746, 751, 755, 759, 764, 770, 776, 782, 787, 791, 795, 801, 806, 811, 815, 819, 824, 830, 836, 842, 847, 851, 855, 861, 866, 871, 875, 879, 884, 890, 896, 902, 907, 911, 915, 921, 926, 931, 935, 939, 944, 950, 956, 962, 967, 971, 975, 981, 986, 991, 995, 999, 1004, 1010, 1016, 1022, 1027, 1031, 1035, 1041, 1046, 1051, 1055, 1059, 1064, 1070, 1076, 1082, 1087, 1091, 1095, 1101, 1106, 1111, 1115, 1119, 1124, 1130, 1136, 1142, 1147, 1151, 1155, 1161, 1166, 1171, 1175, 1179, 1184, 1190, 1196, 1202, 1207, 1211, 1215, 1221, 1226, 1231, 1235, 1239, 1244, 1250, 1256, 1262, 1267, 1271, 1275, 1281, 1286, 1291, 1295, 1299, 1304, 1310, 1316, 1322, 1327, 1331, 1335, 1341, 1346, 1351, 1355, 1359, 1364, 1370, 1376, 1382, 1387, 1391, 1395, 1401, 1406, 1411, 1415, 1419, 1424, 1430, 1436, 1442, 1447, 1451, 1455, 1461, 1466, 1471, 1475, 1479, 1484, 1490, 1496, 1502, 1507, 1511, 1515, 1521, 1526, 1531, 1535, 1539, 1544, 1550, 1556, 1562, 1567, 1571, 1575, 1581, 1586, 1591, 1595, 1599, 1604, 1610, 1616, 1622, 1627, 1631, 1635, 1641, 1646, 1651, 1655, 1659, 1664, 1670, 1676, 1682, 1687, 1691, 1695, 1701, 1706, 1711, 1715, 1719, 1724, 1730, 1736, 1742, 1747, 1751, 1755, 1761, 1766, 1771, 1775, 1779, 1784, 1790, 1796, 1802, 1807, 1811, 1815, 1821, 1826, 1831, 1835, 1839, 1844, 1850, 1856, 1862, 1867, 1871, 1875, 1881, 1886, 1891, 1895, 1899, 1904, 1910, 1916, 1922, 1927, 1931, 1935, 1941, 1946, 1951, 1955, 1959, 1964, 1970, 1976, 1982, 1987, 1991, 1995, 2001, 2006, 2011, 2015, 2019, 2024, 2030, 2036, 2042, 2047, 2051, 2055, 2061, 2066, 2071, 2075, 2079, 2084, 2090, 2096, 2102, 2107, 2111, 2115, 2121, 2126, 2131, 2135, 2139, 2144, 2150, 2156, 2162, 2167, 2171, 2175, 2181, 2186, 2191, 2195, 2199, 2204, 2210, 2216, 2222, 2227, 2231, 2235, 2241, 2246, 2251, 2255, 2259, 2264, 2270, 2276, 2282, 2287, 2291, 2295, 2301, 2306, 2311, 2315, 2319, 2324, 2330, 2336, 2342, 2347, 2351, 2355, 2361, 2366, 2371, 2375, 2379, 2384, 2390, 2396, 2402, 2407, 2411, 2415, 2421, 2426, 2431, 2435, 2439, 2444, 2450, 2456, 2462, 2467, 2471, 2475, 2481, 2486, 2491, 2495, 2499, 2504, 2510, 2516, 2522, 2527, 2531, 2535, 2541, 2546, 2551, 2555, 2559, 2564, 2570, 2576, 2582, 2587, 2591, 2595, 2601, 2606, 2611, 2615, 2619, 2624, 2630, 2636, 2642, 2647, 2651, 2655, 2661, 2666, 2671, 2675, 2679, 2684, 2690, 2696, 2702, 2707, 2711, 2715, 2721, 2726, 2731, 2735, 2739, 2744, 2750, 2756, 2762, 2767, 2771, 2775, 2781, 2786, 2791, 2795, 2799, 2804, 2810, 2816, 2822, 2827, 2831, 2835, 2841, 2846, 2851, 2855, 2859, 2864, 2870, 2876, 2882, 2887, 2891, 2895, 2901, 2906, 2911, 2915, 2919, 2924, 2930, 2936, 2942, 2947, 2951, 2955, 2961, 2966, 2971, 2975, 2979, 2984, 2990, 2996, 3002, 3007, 3011, 3015, 3021, 3026, 3031, 3035, 3039, 3044, 3050, 3056, 3062, 3067, 3071, 3075, 3081, 3086, 3091, 3095, 3099, 3104, 3110, 3116, 3122, 3127, 3131, 3135, 3141, 3146, 3151, 3155, 3159, 3164, 3170, 3176, 3182, 3187, 3191, 3195, 3201, 3206, 3211, 3215, 3219, 3224, 3230, 3236, 3242, 3247, 3251, 3255, 3261, 3266, 3271, 3275, 3279, 3284, 3290, 3296, 3302, 3307, 3311, 3315, 3321, 3326, 3331, 3335, 3339, 3344, 3350, 3356, 3362, 3367, 3371, 3375, 3381, 3386, 3391, 3395, 3399, 3404, 3410, 3416, 3422, 3427, 3431, 3435, 3441, 3446, 3451, 3455, 3459, 3464, 3470, 3476, 3482, 3487, 3491, 3495, 3501, 3506, 3511, 3515, 3519, 3524, 3530, 3536, 3542, 3547, 3551, 3555, 3561, 3566, 3571, 3575, 3579, 3584, 3590, 3596, 3602, 3607, 3611, 3615, 3621, 3626, 3631, 3635, 3639, 3644, 3650, 3656, 3662, 3667, 3671, 3675, 3681, 3686, 3691, 3695, 3699, 3704, 3710, 3716, 3722, 3727, 3731, 3735, 3741, 3746, 3751, 3755, 3759, 3764, 3770, 3776, 3782, 3787, 3791, 3795, 3801, 3806, 3811, 3815, 3819, 3824, 3830, 3836, 3842, 3847, 3851, 3855, 3861, 3866, 3871, 3875, 3879, 3884, 3890, 3896, 3902, 3907, 3911, 3915, 3921, 3926, 3931, 3935, 3939, 3944, 3950, 3956, 3962, 3967, 3971, 3975, 3981, 3986, 3991, 3995, 3999, 4004, 4010, 4016, 4022, 4027, 4031, 4035, 4041, 4046, 4051, 4055, 4059, 4064, 4070, 4076, 4082, 4087, 4091, 4095, 4101, 4106, 4111, 4115, 4119, 4124, 4130, 4136, 4142, 4147, 4151, 4155, 4161, 4166, 4171, 4175, 4179, 4184, 4190, 4196, 4202, 4207, 4211, 4215, 4221, 4226, 4231, 4235, 4239, 4244, 4250, 4256, 4262, 4267, 4271, 4275, 4281, 4286, 4291, 4295, 4299, 4304, 4310, 4316, 4322, 4327, 4331, 4335, 4341, 4346, 4351, 4355, 4359, 4364, 4370, 4376, 4382, 4387, 4391, 4395, 4401, 4406, 4411, 4415, 4419, 4424, 4430, 4436, 4442, 4447, 4451, 4455, 4461, 4466, 4471, 4475, 4479, 4484, 4490, 4496, 4502, 4507, 4511, 4515, 4521, 4526, 4531, 4535, 4539, 4544, 4550, 4556, 4562, 4567, 4571, 4575, 4581, 4586, 4591, 4595, 4599, 4604, 4610, 4616, 4622, 4627, 4631, 4635, 4641, 4646, 4651, 4655, 4659, 4664, 4670, 4676, 4682, 4687, 4691, 4695, 4701, 4706, 4711, 4715, 4719, 4724, 4730, 4736, 4742, 4747, 4751, 4755, 4761, 4766, 4771, 4775, 4779, 4784, 4790, 4796, 4802, 4807, 4811, 4815, 4821, 4826, 4831, 4835, 4839, 4844, 4850, 4856, 4862, 4867, 4871, 4875, 4881, 4886, 4891, 4895, 4899, 4904, 4910, 4916, 4922, 4927, 4931, 4935, 4941, 4946, 4951, 4955, 4959, 4964, 4970, 4976, 4982, 4987, 4991, ...

 

 

Un début de cartographie des suites D3(n) :

 

                                               

   1--5--9------14--19--23--27--32------38--43--47--51--56------62--67--71------75--81--86--91--95--99 ...

                |           |           |       |   |   |

      3--8------+           |   30------+       |   |   |

                            |           |       |   |   |

            12------20------+           |       |   |   |

                            |           |       |   |   |

      4-----10--16------22--+           |       |   |   |

                                        |       |   |   |

                    18--25--29--33------+       |   |   |

                                |               |   |   |

                                |       40------+   |   |

                                |                   |   |

                                |               46--+   |

                                |                   |   |

                        24------+   37--41--45------+   |

                                                        |

                                    36------+           |

                                            |           |

      2--7--11--15--21------26--31--35--39--44------50--+

                    |                   |           |

         6--13--17--+       28------34--+   42------+

 

 

La suite des nombres qui n’ont pas de prédécesseur dans D3 (en jaune ci-dessus) est :

 

AucunPrédécesseur(D3) = 1, 2, 3, 4, 6, 12, 18, 24, 28, 30, 36, 37, 40, 42, 46, 48, 49, 52, 54, 55, 60, 64, 66, 72, 78, 80, 84, 88, 90, 96, 97, 100, 102, 106, 108, 112, 114, 115, 120, 124, 126, 132, 133, 138, 144, 150, 156, 157, 160, 162, 166, 168, 172, 174, 175, 180, 184, 186, 192, 198, 200, 204, 208, 210, 216, 217, 220, 222, 228, 232, 234, 235, 240, 244, 246, 252, 258, 260, 264, 268, 270, 276, 277, 280, 282, 286, 288, 292, 294, 295, 300, 301, 304, 306, 312, 318, 320, 324, 328, 330, 336, 337, 340, 342, 348, 352, 354, 355, 360, 364, 366, 372, 378, 384, 385, 388, 390, 396, 397, 400, 402, 406, 408, 412, 414, 415, 420, 424, 426, 432, 438, 440, 444, 448, 450, 456, 457, 460, 462, 466, 468, 469, 472, 474, 475, 480, 484, 486, 492, 498, 504, 508, 510, 516, 517, 520, 522, 526, 528, 532, 534, 535, 540, 544, 546, 552, 553, 558, 560, 564, 568, 570, 576, 577, 580, 582, 588, 592, 594, 595, 600, 604, 606, 612, 618, 624, 628, 630, 636, 637, 640, 642, 646, 648, 652, 654, 655, 660, 664, 666, 672, 678, 680, 684, 688, 690, 696, 697, 700, 702, 706, 712, 714, 715, 720, 721, 724, 726, 732, 738, 744, 748, 750, 756, 757, 760, 762, 768, 772, 774, 775, 780, 784, 786, 792, 798, 800, 804, 805, 808, 810, 816, 817, 820, 822, 826, 828, 832, 834, 835, 840, 844, 846, 852, 858, 864, 868, 870, 876, 877, 880, 882, 886, 888, 889, 892, 894, 895, 900, 904, 906, 912, 918, 920, 924, 928, 930, 936, 937, 940, 942, 948, 952, 954, 955, 960, 964, 966, 972, 973, 978, 984, 990, 996, 997, 1000, 1002, 1006, 1008, 1012, 1014, 1015, 1020, 1024, 1026, 1032, 1038, 1040, 1044, 1048, 1050, 1056, 1057, 1060, 1062, 1066, 1068, 1072, 1074, 1075, 1080, 1084, 1086, 1092, 1098, 1100, 1104, 1108, 1110, 1116, 1117, 1120, 1122, 1126, 1128, 1132, 1134, 1135, 1140, 1141, 1144, 1146, 1152, 1158, 1160, 1164, 1168, 1170, 1176, 1177, 1180, 1182, 1188, 1192, 1194, 1195, 1200, 1204, 1206, 1212, 1218, 1224, 1225, 1228, 1230, 1236, 1237, 1240, 1242, 1246, 1248, 1252, 1254, 1255, 1260, 1264, 1266, 1272, 1278, 1280, 1284, 1288, 1290, 1296, 1297, 1300, 1302, 1308, 1309, 1312, 1314, 1315, 1320, 1324, 1326, 1332, 1338, 1344, 1348, 1350, 1356, 1357, 1360, 1362, 1366, 1368, 1372, 1374, 1375, 1380, 1384, 1386, 1392, 1393, 1398, 1400, 1404, 1408, 1410, 1416, 1417, 1420, 1422, 1426, 1428, 1432, 1434, 1435, 1440, 1444, 1446, 1452, 1458, 1464, 1468, 1470, 1476, 1477, 1480, 1482, 1486, 1488, 1492, 1494, 1495, 1500, 1504, 1506, 1512, 1518, 1520, 1524, 1528, 1530, 1536, 1537, 1540, 1542, 1546, 1552, 1554, 1555, 1560, 1561, 1564, 1566, 1572, 1578, 1584, 1588, 1590, 1596, 1597, 1600, 1602, 1606, 1608, 1612, 1614, 1615, 1620, 1624, 1626, 1632, 1638, 1640, 1644, 1645, 1648, 1650, 1656, 1657, 1660, 1662, 1668, 1672, 1674, 1675, 1680, 1684, 1686, 1692, 1698, 1704, 1708, 1710, 1716, 1717, 1720, 1722, 1726, 1728, 1729, 1732, 1734, 1735, 1740, 1744, 1746, 1752, 1758, 1760, 1764, 1768, 1770, 1776, 1777, 1780, 1782, 1786, 1788, 1792, 1794, 1795, 1800, 1804, 1806, 1812, 1818, 1824, 1830, 1836, 1837, 1840, 1842, 1846, 1848, 1852, 1854, 1855, 1860, 1864, 1866, 1872, 1878, 1880, 1884, 1888, 1890, 1896, 1897, 1900, 1902, 1906, 1908, 1912, 1914, 1915, 1920, 1924, 1926, 1932, 1938, 1940, 1944, 1948, 1950, 1956, 1957, 1960, 1962, 1966, 1968, 1972, 1974, 1975, 1980, 1981, 1984, 1986, 1992, 1998, 2000, 2004, 2008, ...

 

On voit que 2008 fait partie de cette liste ; il est donc impossible d’atteindre ce nombre selon la loi D3 (alors que c’est possible avec D2).

Jacques T. remarque aussi que les nombres de AucunPrédécesseur(D3) sont presque tous divisibles par 6 : « The above numbers are 'nearly' all multiple of 6 ».

 

__________

 

Note vaguement autoréférente :

 

La loi D2 qui ouvre cette page « Ajouter à n le 2e nombre qui ne divise pas n » pourrait se parfumer d’autoréférence : « Ajouter à n le ne nombre qui ne divise pas n ». Ainsi, au lieu d’ajouter à n le 2e entier qui ne le divise pas, ou le 3e, ou le 4e, etc. (ce sont les suites D2, D3, D4...), on lui ajouterait chaque fois le ne entier qui ne le divise pas ; c’est donc n lui-même qui fixerait le nombre de non-diviseurs à considérer. Appelons DN(1) la suite de tels nombres qui commence par 1 ; elle a été calculée indépendamment par Jacques T., Jean-Marc Falcoz Nathalie Demole et Hans Havermann (merci à eux) :

 

DN(1) = 1, 3, 8, 20, 46, 96, 204, 420, 864, 1752, 3520, 7068, 14160, 28360, 56736, 113508, 227040, 454176, 908424, 1816944, 3633908, 7267828, 14535662, 29071328, 58142704, 116285418, 232570884, 465141864, 930283760, 1860567600, 3721135320, 7442270736, 14884541492, 29769083008, 59538166080, 119076332272, 238152664554, 476305329172, 952610658350, 1905221316724, 3810442633460, 7620885266932, 15241770533876, 30483541067764, 60967082135576, 121934164271216, 243868328542452, 487736657084916, 975473314169850, 1950946628339784, 3901893256679600, 7803786513359440, 15607573026718920, 31215146053437936, 62430292106875932, 124860584213751888, 249721168427503836, 499442336855007768, 998884673710015632, 1997769347420031424, 3995538694840062876, 7991077389680125800, 15982154779360251888, 31964309558720504176, 63928619117441008362, 127857238234882016772, 255714476469764033736, 511428952939528067568, 1022857905879056135176, 2045715811758112270368, 4091431623516224540760, 8182863247032449081584, 16365726494064898163188, 32731452988129796326472, 65462905976259592652952, 130925811952519185306032, 261851623905038370612104, 523703247810076741224216, 1047406495620153482448496, 2094812991240306964897012, 4189625982480613929794036, 8379251964961227859588084, 16758503929922455719176192, 33517007859844911438352480, 67034015719689822876705056, 134068031439379645753410160, 268136062878759291506820640, 536272125757518583013641472, 1072544251515037166027283088, 2145088503030074332054566196, 4290177006060148664109132404, 8580354012120297328218264820, 17160708024240594656436529688, 34321416048481189312873059408, 68642832096962378625746118936, 137285664193924757251492238000, 274571328387849514502984477280, 549142656775699029005968954848, 1098285313551398058011937909732, 2196570627102796116023875819704, 4393141254205592232047751639472, 8786282508411184464095503278954, 17572565016822368928191006558100, 35145130033644737856382013117352, 70290260067289475712764026235216, 140580520134578951425528052470512, 281161040269157902851056104941104, 562322080538315805702112209882448, 1124644161076631611404224419764936, 2249288322153263222808448839530000, 4498576644306526445616897679060100, 8997153288613052891233795358120488, 17994306577226105782467590716241104, 35988613154452211564935181432482288, 71977226308904423129870362864964616, 143954452617808846259740725729929616, 287908905235617692519481451459859312, 575817810471235385038962902919718684, 1151635620942470770077925805839437380, 2303271241884941540155851611678874808, 4606542483769883080311703223357749680, 9213084967539766160623406446715499840, 18426169935079532321246812893430999736, 36852339870159064642493625786861999480, 73704679740318129284987251573723999088, 147409359480636258569974503147447998336, 294818718961272517139949006294895996704, 589637437922545034279898012589791993792, 1179274875845090068559796025179583987640, 2358549751690180137119592050359167975792, 4717099503380360274239184100718335951904, 9434199006760720548478368201436671904000, 18868398013521441096956736402873343808576, 37736796027042882193913472805746687617208, 75473592054085764387826945611493375234928, 150947184108171528775653891222986750469876, 301894368216343057551307782445973500939944, 603788736432686115102615564891947001879952, 1207577472865372230205231129783894003759944, 2415154945730744460410462259567788007520016, 4830309891461488920820924519135576015040672, 9660619782922977841641849038271152030081392, 19321239565845955683283698076542304060163104, 38642479131691911366567396153084608120326592, 77284958263383822733134792306169216240653408, 154569916526767645466269584612338432481307008, 309139833053535290932539169224676864962614400, 618279666107070581865078338449353729925231872, 1236559332214141163730156676898707459850464032, 2473118664428282327460313353797414919700928256, 4946237328856564654920626707594829839401856944, 9892474657713129309841253415189659678803715808, 19784949315426258619682506830379319357607432384, 39569898630852517239365013660758638715214865440, 79139797261705034478730027321517277430429730976, 158279594523410068957460054643034554860859463104, 316559189046820137914920109286069109721718926432, 633118378093640275829840218572138219443437852876, 1266236756187280551659680437144276438886875705800, 2532473512374561103319360874288552877773751413136, 5064947024749122206638721748577105755547502826312, 10129894049498244413277443497154211511095005652672, 20259788098996488826554886994308423022190011305568, 40519576197992977653109773988616846044380022611160, 81039152395985955306219547977233692088760045222336, 162078304791971910612439095954467384177520090444784, 324156609583943821224878191908934768355040180890208, 648313219167887642449756383817869536710080361780608, 1296626438335775284899512767635739073420160723561984, 2593252876671550569799025535271478146840321447124288, 5186505753343101139598051070542956293680642894248632, 10373011506686202279196102141085912587361285788497328, 20746023013372404558392204282171825174722571576994816, 41492046026744809116784408564343650349445143153989676, 82984092053489618233568817128687300698890286307979448, 165968184106979236467137634257374601397780572615958912, 331936368213958472934275268514749202795561145231917984, 663872736427916945868550537029498405591122290463836064, 1327745472855833891737101074058996811182244580927672224, 2655490945711667783474202148117993622364489161855344544, 5310981891423335566948404296235987244728978323710689472, 10621963782846671133896808592471974489457956647421379056, 21243927565693342267793617184943948978915913294842758192, 42487855131386684535587234369887897957831826589685516464, 84975710262773369071174468739775795915663653179371033728, 169951420525546738142348937479551591831327306358742067584, 339902841051093476284697874959103183662654612717484135424, 679805682102186952569395749918206367325309225434968271200, 1359611364204373905138791499836412734650618450869936565440, 2719222728408747810277582999672825469301236901739873131216, 5438445456817495620555165999345650938602473803479746262752, 10876890913634991241110331998691301877204947606959492525888, 21753781827269982482220663997382603754409895213918985051832, 43507563654539964964441327994765207508819790427837970103792, 87015127309079929928882655989530415017639580855675940207664, 174030254618159859857765311979060830035279161711351880415368, 348060509236319719715530623958121660070558323422703760830992, 696121018472639439431061247916243320141116646845407521662064, 1392242036945278878862122495832486640282233293690815043324148, 2784484073890557757724244991664973280564466587381630086648344, 5568968147781115515448489983329946561128933174763260173296720, 11137936295562231030896979966659893122257866349526520346593760, 22275872591124462061793959933319786244515732699053040693187568, 44551745182248924123587919866639572489031465398106081386375776, 89103490364497848247175839733279144978062930796212162772752320, 178206980728995696494351679466558289956125861592424325545507328, 356413961457991392988703358933116579912251723184848651091014816, 712827922915982785977406717866233159824503446369697302182029824, 1425655845831965571954813435732466319649006892739394604364059728, 2851311691663931143909626871464932639298013785478789208728119536, 5702623383327862287819253742929865278596027570957578417456239232, 11405246766655724575638507485859730557192055141915156834912478496, 22810493533311449151277014971719461114384110283830313669824957088, 45620987066622898302554029943438922228768220567660627339649914320, 91241974133245796605108059886877844457536441135321254679299832480,...

 

 

La formule donnant le terme a(n) ci-dessus est très simple, comme l’ont noté plusieurs intervenants sur SeqFans : « Each term is twice the previous term plus the number of divisors of the previous term » ou, de manière plus concise : « This rule simply takes n to 2n + tau(n) ».

Franklin T. Adams-Watters ajoute : « (...) it is likely that 1 is the only square in the sequence, which would make 1 and 3 the only odd numbers in the sequence. » Cette suite vaguement autoréférente est désormais archivée dans la base de Neil Sloane sous l’étiquette A140781.

 

 

Les nombres DN qui n’ont pas de prédécesseurs sont (merci encore à Nicolas Graner) :

 

AucunPrédécesseur(DN) = 1, 2, 4, 5, 7, 9, 10, 13, 14, 15, 17, 18, 19, 22, 23, 25, 26, 27, 29, 31, 33, 35, 38, 39, 41, 43, 44, 45, 47, 49, 50, 51, 52, 54, 55, 57, 59, 61, 63, 65, 66, 67, 69, 71, 73, 75, 77, 78, 79, 83, 85, 86, 87, 89, 90, 91, 93, 95, 97, 98, 99, 100, 102, 103, 104, 105, 107, 109, 111, 112, 113, 115, 117, 119, 121, 122, 123, 125, 126, 127, 129, 130, 131, 133, 137, 138, 139, 141, 143, 145, 146, 147, 149, 150, 151, 153, 154, 155, 157, 159, 161, 162, 163, 165, 166, 169, 171, 172, 173, 175, 177, 179, 181, 182, 183, 185, 187, 188, 189, 191, 193, 195, 197, 198, 199, 200, 201, 203, 205, 206, 207, 210, 211, 213, 214, 215, 217, 219, 221, 222, 223, 224, 225, 227, 229, 230, 231, 232, 233, 235, 237, 239, 241, 243, 244, 246, 247, 249, 251, 252, 253, 255, 257, 258, 259, 260, 261, 263, 265, 266, 267, 269, 271, 273, 274, 275, 277, 279, 281, 282, 283, 285, 287, 289, 291, 293, 295, 297, 298, 299, 301, 305, 306, 307, 308, 309, 310, 311, 313, 315, 317, 318, 319, 321, 323, 325, 327, 329, 330, 331, 333, 335, 337, 339, 340, 342, 343, 344, 345, 346, 347, 349, 351, 353, 354, 355, 357, 359, 361, 363, 365, 366, 367, 368, 369, 371, 373, 375, 377, 379, 381, 383, 385, 387, 389, 390, 391, 393, 394, 395, 397, 399, 402, 403, 404, 405, 407, 409, 411, 413, 415, 417, 418, 419, 421, 423, 425, 427, 428, 429, 431, 433, 435, 437, 439, 441, 443, 444, 445, 447, 449, 450, 451, 453, 454, 455, 457, 458, 461, 462, 463, 464, 465, 466, 467, 469, 471, 473, 475, 476, 477, 479, 481, 482, 483, 485, 486, 487, 488, 489, 491, 493, 495, 497, 499, 501, 503, 505, 506, 507, 509, 511, 513, 514, 515, 517, 519, 520, 523, 525, 526, 527, 529, 530, 531, 533, 535, 536, 537, 539, 541, 543, 545, 546, 547, 548, 549, 550, 551, 553, 555, 557, 558, 559, 561, 562, 563, 565, 566, 567, 569, 570, 571, 573, 575, 577, 579, 582, 583, 584, 585, 587, 589, 591, 592, 593, 595, 596, 597, 598, 599, 601, 603, 604, 605, 607, 609, 611, 612, 613, 615, 617, 619, 620, 621, 623, 625, 626, 627, 629, 630, 631, 633, 634, 635, 637, 639, 641, 643, 645, 647, 648, 649, 651, 653, 655, 657, 659, 660, 661, 665, 666, 667, 668, 669, 671, 673, 675, 677, 678, 679, 680, 681, 683, 684, 685, 687, 688, 689, 691, 693, 694, 695, 697, 699, 701, 702, 703, 704, 705, 706, 707, 709, 711, 713, 715, 717, 719, 721, 723, 724, 726, 727, 729, 730, 731, 733, 735, 737, 738, 739, 741, 742, 743, 745, 747, 749, 750, 751, 752, 753, 754, 755, 757, 759, 761, 762, 763, 764, 765, 767, 769, 770, 771, 773, 774, 775, 777, 779, 781, 783, 785, 787, 788, 789, 791, 793, 795, 797, 798, 799, 801, 802, 803, 805, 807, 808, 809, 811, 813, 816, 817, 819, 821, 822, 823, 824, 825, 827, 829, 831, 833, 835, 836, 837, 839, 841, 842, 843, 845, 846, 847, 849, 850, 851, 853, 854, 855, 857, 859, 861, 863, 865, 867, 869, 870, 871, 872, 873, 874, 875, 877, 879, 881, 882, 883, 885, 886, 887, 889, 890, 893, 895, 897, 899, 901, 902, 903, 904, 905, 907, 908, 909, 911, 913, 914, 915, 917, 919, 921, 922, 923, 925, 927, 929, 930, 931, 933, 934, 935, 937, 939, 941, 943, 944, 945, 947, 949, 951, 953, 955, 957, 958, 959, 961, 962, 963, 965, 967, 969, 970, 971, 972, 973, 975, 978, 979, 980, 981, 983, 985, 986, 987, 988, 989, 991, 993, 994, 995, 997, 999, 1001, 1003, 1005, 1007, 1009, 1010, 1011, 1013, 1015, 1016, 1017, 1018, 1019, 1021, 1023, 1024, 1025, 1027, 1028, 1029, 1030, 1031, 1033, 1035, 1037, 1039, 1040, 1041, 1043, 1045, 1046, 1047, 1049, 1050, 1051, 1052, 1053, 1055, 1057, 1059, 1060, 1063, 1064, 1065, 1066, 1067, 1069, 1071, 1072, 1073, 1075, 1077, 1079, 1081, 1082, 1083, 1085, 1086, 1087, 1089, 1091, 1092, 1093, 1095, 1097, 1098, 1099, 1101, 1103, 1105, 1107, 1109, 1111, 1113, 1114, 1115, 1117, 1119, 1121, 1123, 1124, 1125, 1126, 1127, 1129, 1131, 1132, 1133, 1135, 1137, 1138, 1139, 1141, 1142, 1143, 1145, 1146, 1147, 1148, 1149, 1151, 1152, 1153, 1154, 1155, 1157, 1158, 1159, 1160, 1161, 1163, 1164, 1165, 1167, 1168, 1169, 1171, 1174, 1175, 1177, 1178, 1179, 1180, 1181, 1183, 1184, 1185, 1187, 1189, 1190, 1191, 1192, 1193, 1195, 1196, 1197, 1199, 1201, 1202, 1203, 1205, 1206, 1207, 1208, 1209, 1210, 1211, 1213, 1215, 1217, 1218, 1219, 1221, 1222, 1223, 1225, 1227, 1229, 1230, 1231, 1233, 1234, 1235, 1237, 1239, 1241, 1243, 1245, 1246, 1247, 1249, 1251, 1253, 1254, 1257, 1258, 1259, 1260, 1261, 1263, 1265, 1266, 1267, 1269, 1271, 1273, 1275, 1276, 1277, 1278, 1279, 1281, 1282, 1283, 1285, 1286, 1287, 1289, 1290, 1291, 1293, 1294, 1295, 1297, 1299, 1301, 1303, 1304, 1305, 1306, 1307, 1309, 1311, 1313, 1315, 1317, 1318, 1319, 1321, 1323, 1325, 1326, 1327, 1329, 1330, 1331, 1332, 1333, 1335, 1337, 1339, 1340, 1341, 1343, 1345, 1347, 1349, 1350, 1351, 1353, 1354, 1355, 1357, 1358, 1359, 1360, 1363, 1365, 1367, 1369, 1370, 1371, 1373, 1375, 1377, 1379, 1381, 1383, 1385, 1387, 1388, 1389, 1391, 1393, 1395, 1397, 1399, 1401, 1403, 1405, 1406, 1407, 1409, 1411, 1412, 1413, 1414, 1415, 1417, 1419, 1421, 1423, 1424, 1425, 1426, 1427, 1429, 1431, 1433, 1434, 1435, 1436, 1437, 1439, 1441, 1442, 1443, 1445, 1447, 1448, 1449, 1451, 1452, 1453, 1455, 1457, 1458, 1459, 1460, 1461, 1462, 1463, 1467, 1469, 1471, 1473, 1474, 1475, 1477, 1479, 1481, 1483, 1485, 1486, 1487, 1489, 1491, 1493, 1495, 1497, 1498, 1499, 1501, 1503, 1505, 1506, 1507, 1509, 1511, 1512, 1513, 1515, 1517, 1518, 1519, 1521, 1522, 1523, 1525, 1527, 1528, 1529, 1531, 1533, 1535, 1537, 1539, 1541, 1543, 1544, 1545, 1547, 1549, 1551, 1552, 1553, 1555, 1557, 1558, 1559, 1561, 1563, 1564, 1565, 1567, 1568, 1569, 1570, 1571, 1573, 1575, 1577, 1578, 1579, 1581, 1585, 1587, 1589, 1591, 1593, 1594, 1595, 1597, 1599, 1600, 1601, 1603, 1604, 1605, 1606, 1607, 1609, 1611, 1613, 1614, 1615, 1616, 1617, 1619, 1621, 1622, 1623, 1625, 1626, 1627, 1628, 1629, 1631, 1632, 1633, 1635, 1637, 1639, 1641, 1642, 1643, 1645, 1646, 1647, 1649, 1651, 1653, 1654, 1655, 1657, 1658, 1659, 1661, 1663, 1664, 1665, 1667, 1669, 1670, 1671, 1673, 1675, 1677, 1679, 1681, 1683, 1686, 1687, 1689, 1691, 1692, 1693, 1695, 1697, 1698, 1699, 1701, 1703, 1705, 1707, 1709, 1710, 1711, 1713, 1714, 1715, 1717, 1718, 1719, 1721, 1723, 1724, 1725, 1726, 1727, 1729, 1731, 1733, 1735, 1737, 1738, 1739, 1741, 1743, 1744, 1745, 1747, 1749, 1750, 1751, 1753, 1754, 1755, 1757, 1759, 1761, 1763, 1765, 1766, 1767, 1769, 1770, 1771, 1772, 1773, 1774, 1775, 1777, 1779, 1781, 1783, 1784, 1785, 1786, 1787, 1789, 1791, 1793, 1795, 1797, 1798, 1799, 1801, 1803, 1804, 1805, 1807, 1809, 1810, 1811, 1813, 1815, 1817, 1818, 1819, 1821, 1823, 1825, 1826, 1828, 1829, 1831, 1833, 1834, 1835, 1837, 1839, 1841, 1842, 1843, 1845, 1847, 1849, 1851, 1853, 1854, 1855, 1857, 1858, 1859, 1861, 1862, 1863, 1864, 1865, 1866, 1867, 1869, 1871, 1873, 1874, 1875, 1877, 1879, 1880, 1881, 1883, 1885, 1886, 1887, 1888, 1889, 1891, 1893, 1894, 1895, 1897, 1899, 1901, 1903, 1904, 1905, 1907, 1909, 1910, 1911, 1913, 1915, 1916, 1917, 1919, 1921, 1923, 1924, 1926, 1927, 1928, 1929, 1930, 1931, 1933, 1935, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1945, 1947, 1949, 1951, 1953, 1954, 1955, 1957, 1958, 1959, 1960, 1961, 1963, 1965, 1966, 1967, 1969, 1970, 1971, 1972, 1973, 1975, 1976, 1977, 1979, 1981, 1983, 1985, 1986, 1987, 1989, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2011, 2013, 2015, 2017, 2019, 2021, 2022, 2023, 2024, 2025, 2027, 2029, 2030, 2031, 2032, 2033, 2034, 2035, 2037, 2039, 2041, 2042, 2043, 2045, 2047, 2048, 2049, 2050, 2051, 2053, 2055, 2057, 2060, 2061, 2063, 2065, 2067, 2069, 2070, 2071, 2072, 2073, 2074, 2075, 2077, 2079, 2081, 2083, 2085, 2087, 2089, 2091, 2092, 2093, 2094, 2095, 2097, 2099, 2101, 2102, 2103, 2105, 2107, 2108, 2109, 2111, 2112, 2113, 2115, 2117, 2119, 2120, 2121, 2123, 2125, 2126, 2127, 2129, 2130, 2131, 2133, 2134, 2135, 2137, 2139, 2141, 2142, 2143, 2145, 2146, 2147, 2149, 2151, 2152, 2153, 2155, 2157, 2159, 2160, 2161, 2163, 2164, 2165, 2167, 2169, 2170, 2171, 2173, 2175, 2177, 2179, 2181, 2182, 2183, 2185, 2186, 2189, 2191, 2193, 2194, 2195, 2197, 2199, 2201, 2203, 2204, 2205, 2207, 2209, 2210, 2211, 2213, 2214, 2215, 2216, 2217, 2219, 2221, 2223, 2224, 2225, 2227, 2229, 2230, 2231, 2233, 2235, 2237, 2238, 2239, 2240, 2241, 2243, 2245, 2247, 2249, 2251, 2252, 2253, 2255, 2257, 2258, 2259, 2261, 2263, 2265, 2266, 2267, 2269, 2271, 2273, 2275, 2276, 2277, 2279, 2281, 2283, 2284, 2285, 2287, 2289, 2290, 2291, 2293, 2295, 2296, 2297, 2299, 2301, 2303, 2305, 2306, 2307, 2309, 2310, 2311, 2313, 2314, 2315, 2316, 2317, 2319, 2320, 2323, 2325, 2327, 2329, 2331, 2333, 2335, 2337, 2339, 2341, 2343, 2345, 2347, 2348, 2349, 2351, 2353, 2355, 2357, 2359, 2360, 2361, 2362, 2363, 2365, 2366, 2367, 2368, 2369, 2370, 2371, 2373, 2374, 2375, 2377, 2379, 2381, 2383, 2384, 2385, 2387, 2389, 2390, 2391, 2393, 2395, 2397, 2398, 2399, 2401, 2403, 2405, 2407, 2409, 2411, 2412, 2413, 2415, 2416, 2417, 2419, 2421, 2422, 2423, 2425, 2427, 2429, 2431, 2433, 2434, 2435, 2437, 2438, 2439, 2440, 2441, 2443, 2444, 2445, 2447, 2449, 2451, 2453, 2454, 2455, 2457, 2461, 2463, 2465, 2466, 2467, 2468, 2469, 2470, 2471, 2473, 2474, 2475, 2477, 2479, 2481, 2482, 2483, 2485, 2487, 2488, 2489, 2491, 2492, 2493, 2495, 2497, 2499, 2501, 2502, 2503, 2504, 2505, 2506, 2507, 2509, 2511, 2512, 2513, 2515, 2516, 2517, 2519, 2521, 2522, 2523, 2525, 2527, 2529, 2531, 2532, 2533, 2534, 2535, 2536, 2537, 2539, 2541, 2543, 2544, 2545, 2547, 2549, 2551, 2552, 2553, 2554, 2555, 2557, 2558, 2559, 2561, 2563, 2565, 2566, 2567, 2569, 2571, 2572, 2573, 2575, 2577, 2579, 2581, 2582, 2583, 2585, 2587, 2588, 2589, 2591, 2593, 2594, 2595, 2597, 2599, 2600, 2601, 2603, 2605, 2606, 2607, 2609, 2610, 2611, 2612, 2613, 2614, 2615, 2619, 2621, 2623, 2624, 2625, 2627, 2629, 2631, 2632, 2633, 2635, 2637, 2639, 2641, 2642, 2643, 2645, 2646, 2647, 2649, 2650, 2651, 2652, 2653, 2655, 2657, 2659, 2660, 2661, 2663, 2664, 2665, 2667, 2669, 2671, 2673, 2674, 2675, 2677, 2679, 2681, 2683, 2685, 2686, 2687, 2689, 2691, 2693, 2695, 2697, 2699, 2700, 2701, 2703, 2704, 2705, 2707, 2708, 2709, 2710, 2711, 2713, 2715, 2717, 2719, 2720, 2721, 2722, 2723, 2725, 2726, 2727, 2728, 2729, 2731, 2733, 2734, 2735, 2737, 2738, 2739, 2742, 2743, 2744, 2745, 2747, 2749, 2750, 2751, 2752, 2753, 2754, 2755, 2757, 2759, 2761, 2763, 2765, 2766, 2767, 2769, 2771, 2772, 2773, 2775, 2777, 2779, 2780, 2781, 2783, 2785, 2787, 2789, 2791, 2792, 2793, 2794, 2795, 2797, 2799, 2801, 2803, 2805, 2807, 2809, 2811, 2812, 2813, 2815, 2816, 2817, 2818, 2819, 2821, 2823, 2825, 2827, 2828, 2829, 2831, 2833, 2835, 2837, 2839, 2841, 2842, 2843, 2844, 2845, 2847, 2849, 2850, 2851, 2853, 2854, 2855, 2857, 2859, 2861, 2863, 2864, 2865, 2866, 2867, 2869, 2871, 2873, 2874, 2875, 2877, 2879, 2881, 2882, 2883, 2884, 2885, 2887, 2888, 2889, 2890, 2891, 2893, 2895, 2898, 2899, 2901, 2902, 2903, 2905, 2906, 2907, 2909, 2911, 2913, 2914, 2915, 2917, 2919, 2921, 2923, 2924, 2925, 2927, 2928, 2929, 2931, 2933, 2935, 2937, 2938, 2939, 2941, 2943, 2945, 2946, 2947, 2948, 2949, 2951, 2952, 2953, 2954, 2955, 2957, 2959, 2961, 2962, 2963, 2965, 2967, 2969, 2971, 2972, 2973, 2974, 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3225, 3226, 3227, 3229, 3230, 3231, 3233, 3234, 3235, 3237, 3239, 3241, 3243, 3245, 3247, 3249, 3251, 3252, 3253, 3254, 3255, 3257, 3259, 3261, 3262, 3263, 3265, 3267, 3269, 3271, 3272, 3273, 3274, 3275, 3277, 3279, 3280, 3281, 3283, 3284, 3285, 3287, 3289, 3291, 3292, 3293, 3294, 3295, 3297, 3299, 3301, 3303, 3304, 3305, 3307, 3308, 3309, 3310, 3311, 3313, 3315, 3317, 3318, 3319, 3321, 3322, 3323, 3325, 3327, 3329, 3330, 3331, 3333, 3334, 3335, 3337, 3338, 3339, 3341, 3343, 3345, 3347, 3349, 3351, 3352, 3353, 3354, 3355, 3357, 3359, 3361, 3363, 3366, 3367, 3368, 3369, 3371, 3372, 3373, 3375, 3376, 3377, 3379, 3381, 3383, 3385, 3387, 3389, 3390, 3391, 3393, 3394, 3395, 3397, 3399, 3401, 3403, 3405, 3406, 3407, 3408, 3409, 3411, 3413, 3415, 3417, 3419, 3421, 3422, 3423, 3425, 3427, 3429, 3431, 3433, 3435, 3436, 3437, 3439, 3441, 3442, 3443, 3445, 3446, 3447, 3449, 3450, 3451, 3452, 3453, 3455, 3457, 3459, 3461, 3463, 3464, 3465, 3467, 3469, 3471, 3472, 3473, 3475, 3476, 3477, 3478, 3479, 3481, 3483, 3485, 3486, 3487, 3489, 3490, 3491, 3493, 3495, 3497, 3499, 3500, 3501, 3502, 3503, 3505, 3507, 3509, 3510, 3511, 3513, 3514, 3515, 3517, 3519, 3521, 3522, 3523, 3525, 3527, 3529, 3531, 3532, 3533, 3535, 3537, 3538, 3539, 3540, 3541, 3543, 3545, 3546, 3547, 3548, 3549, 3551, 3553, 3554, 3557, 3558, 3559, 3560, 3561, 3563, 3565, 3567, 3569, 3570, 3571, 3573, 3574, 3575, 3577, 3578, 3579, 3581, 3582, 3583, 3585, 3587, 3589, 3591, 3592, 3593, 3595, 3596, 3597, 3599, 3600, 3601, 3603, 3605, 3606, 3607, 3608, 3609, 3611, 3613, 3614, 3615, 3617, 3619, 3621, 3622, 3623, 3625, 3627, 3629, 3630, 3631, 3633, 3634, 3635, 3637, 3639, 3641, 3643, 3644, 3645, 3647, 3649, 3650, 3651, 3652, 3653, 3654, 3655, 3657, 3658, 3659, 3661, 3663, 3665, 3667, 3668, 3669, 3670, 3671, 3673, 3675, 3677, 3679, 3681, 3683, 3684, 3685, 3687, 3688, 3689, 3691, 3693, 3695, 3697, 3698, 3699, 3703, 3704, 3705, 3707, 3708, 3709, 3711, 3713, 3714, 3715, 3716, 3717, 3719, 3721, 3722, 3723, 3725, 3727, 3729, 3730, 3731, 3732, 3733, 3735, 3737, 3738, 3739, 3741, 3743, 3745, 3747, 3749, 3750, 3751, 3753, 3754, 3755, 3757, 3758, 3759, 3761, 3762, 3763, 3765, 3766, 3767, 3769, 3771, 3772, 3773, 3775, 3777, 3779, 3781, 3783, 3784, 3785, 3787, 3789, 3791, 3793, 3795, 3797, 3799, 3800, 3801, 3802, 3803, 3805, 3806, 3807, 3809, 3811, 3813, 3814, 3815, 3817, 3819, 3820, 3821, 3823, 3824, 3825, 3826, 3827, 3829, 3830, 3831, 3833, 3835, 3836, 3837, 3839, 3840, 3841, 3843, 3845, 3847, 3848, 3849, 3851, 3852, 3853, 3854, 3855, 3856, 3857, 3859, 3861, 3863, 3865, 3866, 3867, 3869, 3870, 3871, 3873, 3874, 3875, 3876, 3877, 3879, 3880, 3881, 3883, 3884, 3885, 3889, 3891, 3893, 3895, 3896, 3897, 3898, 3899, 3901, 3903, 3905, 3906, 3907, 3908, 3909, 3910, 3911, 3913, 3914, 3915, 3917, 3919, 3920, 3921, 3923, 3925, 3927, 3928, 3929, 3931, 3932, 3933, 3935, 3937, 3939, 3940, 3941, 3943, 3945, 3946, 3947, 3949, 3951, 3952, 3953, 3954, 3955, 3957, 3959, 3961, 3962, 3963, 3965, 3967, 3969, 3971, 3972, 3973, 3975, 3977, 3978, 3979, 3981, 3983, 3984, 3985, 3987, 3989, 3991, 3993, 3994, 3995, 3997, 3999, 4001, 4002, 4003, 4004, 4005, 4007, 4009, 4011, 4013, 4015, 4016, 4017, 4018, 4019, 4021, 4022, 4023, 4025, 4026, 4027, 4028, 4029, 4031, 4032, 4033, 4035, 4037, 4039, 4041, 4043, 4044, 4045, 4047, 4048, 4049, 4050, 4051, 4053, 4054, 4055, 4057, 4058, 4059, 4061, 4062, 4063, 4067, 4069, 4071, 4072, 4073, 4075, 4077, 4079, 4081, 4083, 4084, 4085, 4087, 4089, 4090, 4091, 4093, 4095, 4096, 4097, 4099, 4101, 4103, 4104, 4105, 4107, 4109, 4110, 4111, 4113, 4114, 4115, 4117, 4119, 4121, 4123, 4124, 4125, 4126, 4127, 4129, 4130, 4131, 4133, 4134, 4135, 4137, 4139, 4141, 4143, 4144, 4145, 4147, 4149, 4151, 4152, 4153, 4154, 4155, 4157, 4159, 4161, 4162, 4163, 4165, 4166, 4167, 4169, 4170, 4171, 4173, 4175, 4177, 4179, 4181, 4182, 4183, 4185, 4186, 4187, 4188, 4189, 4191, 4192, 4193, 4195, 4197, 4198, 4199, 4201, 4203, 4204, 4205, 4207, 4209, 4211, 4212, 4213, 4215, 4217, 4218, 4219, 4221, 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4727, 4729, 4731, 4732, 4733, 4735, 4737, 4739, 4741, 4743, 4745, 4746, 4747, 4748, 4749, 4751, 4753, 4755, 4757, 4759, 4760, 4761, 4762, 4763, 4765, 4767, 4769, 4770, 4771, 4773, 4774, 4775, 4777, 4779, 4781, 4783, 4785, 4787, 4789, 4790, 4791, 4792, 4793, 4795, 4796, 4797, 4799, 4801, 4803, 4805, 4806, 4809, 4810, 4811, 4813, 4815, 4816, 4817, 4819, 4821, 4822, 4823, 4825, 4827, 4829, 4831, 4833, 4834, 4835, 4837, 4838, 4839, 4840, 4841, 4843, 4844, 4845, 4847, 4849, 4850, 4851, 4853, 4854, 4855, 4857, 4859, 4860, 4861, 4863, 4865, 4866, 4867, 4868, 4869, 4871, 4873, 4875, 4877, 4878, 4879, 4881, 4882, 4883, 4885, 4886, 4887, 4888, 4889, 4891, 4892, 4893, 4894, 4895, 4897, 4899, 4901, 4903, 4904, 4905, 4906, 4907, 4908, 4909, 4911, 4912, 4913, 4915, 4917, 4919, 4921, 4922, 4923, 4924, 4925, 4927, 4929, 4931, 4932, 4933, 4934, 4935, 4937, 4939, 4940, 4941, 4943, 4945, 4947, 4949, 4950, 4951, 4953, 4954, 4955, 4957, 4959, 4961, 4963, 4964, 4965, 4967, 4969, 4971, 4973, 4974, 4975, 4976, 4977, 4979, 4981, 4983, 4985, 4987, 4988, 4989, 4990, 4991, 4993, 4995, 4997, 4999, ...

 

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