id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A128693
[ 6, 15, 18, 21, 33, 39, 45, 51, 54, 57, 63, 69, 87, 93, 99, 111, 117, 123, 129, 135, 141, 153, 159, 162, 171, 177, 183, 189, 201, 207, 213, 219, 237, 249, 261, 267, 279, 291, 297, 303, 309, 321, 327, 333, 339, 351, 369, 381...
[ "nonn" ]
A016207
[ 1, 15, 187, 2259, 27139, 325731, 3908899, 46907043, 562885027, 6754621347, 81055458211, 972665502627, 11671986039715, 140063832492963, 1680765989948323, 20169191879445412, 242030302553476000 ]
[ "nonn", "easy" ]
A066442
[ 0, 0, 0, 0, 2, 0, 5, 0, 0, 4, 1, 0, 12, 4, 3, 0, 12, 0, 12, 16, 6, 12, 12, 0, 7, 14, 0, 16, 12, 24, 12, 0, 12, 8, 3, 0, 12, 30, 12, 16, 12, 36, 12, 12, 27, 6, 12, 0, 19, 24, 45, 40, 12, 0, 23, 32, 18, 2...
[ "nonn" ]
A329999
[ 1, 3, 5, 7, 8, 10, 12, 14, 16, 17, 19, 21, 23, 24, 26, 28, 30, 32, 33, 35, 37, 39, 41, 42, 44, 46, 48, 49, 51, 53, 55, 57, 58, 60, 62, 64, 65, 67, 69, 71, 73, 74, 76, 78, 80, 82, 83, 85, 87, 89, 90, 92, 94, 96,...
[ "nonn", "easy" ]
A070221
[ 1, -1, 3, -2, 4, -5, 1, 2, 6, -8, 10, -6, -2, -3, 15, -14, 16, -14, 2, 4, 12, -20, 2, 8, -10, 4, 22, -24, 26, -29, 9, 6, -10, -4, 34, -18, -6, -8, 36, -34, 36, -32, -6, 18, 24, -44, 4, -2, 12, -4, 40, -50, 8, -...
[ "sign" ]
A048044
[ 0, 0, 0, 0, 1, 4, 10, 30, 60, 105, 217, 364, 588, 1260, 2250, 3960, 9460, 17380, 30745, 71071, 126763, 219765, 503685, 898380, 1572228, 3681588, 6619596, 11666760, 27412041, 49146654, 86461704, 202871284, 363087604, 639438019 ]
[ "nonn" ]
A389661
[ 1, 0, 2, 2, 11, 26, 95, 306, 1045, 3696, 12880, 46800, 168084, 618512, 2272424, 8450904, 31529550, 118404884, 446553796, 1691379888, 6431294914, 24535997500, 93911671490, 360453753660, 1387227140364, 5351642372988, 20692323095400, 80173592291344 ]
[ "nonn" ]
A134846
[ 32, 245, 448, 3747, 24495, 62498, 248998, 2449552, 6393747, 6244998, 244949995, 498998998, 2449489753, 24498999998, 28284271249, 248997999998, 498998999999, 4989989999997, 24899979999998 ]
[ "nonn", "base", "more" ]
A383769
[ 1, 1, 2, 1, 2, 1, 2, 1, 8, 1, 2, 1, 2, 1, 4, 1, 2, 2, 2, 1, 4, 1, 2, 1, 8, 1, 16, 1, 2, 1, 2, 1, 4, 1, 4, 1, 2, 1, 4, 1, 2, 1, 2, 1, 16, 1, 2, 1, 8, 2, 4, 1, 2, 4, 4, 1, 4, 1, 2, 1, 2, 1, 16, ...
[ "nonn", "frac" ]
A351428
[ 1, -1, -3, -11, -41, -75, 1540, 37725, 657715, 10551750, 163089430, 2407275470, 31865298262, 290682880132, -2479867505029, -267542605513289, -11438897571729494, -404343336811199200, -13192591498632628000, -410340915410006600000, -1.2233989907129223e+22 ]
[ "sign" ]
A197824
[ 8, 6, 3, 3, 1, 3, 7, 7, 3, 1, 5, 8, 5, 4, 3, 7, 3, 6, 7, 4, 3, 5, 2, 1, 3, 6, 9, 3, 9, 7, 2, 0, 7, 4, 9, 5, 0, 8, 3, 2, 6, 1, 5, 5, 5, 8, 8, 9, 9, 0, 8, 0, 0, 5, 6, 6, 0, 4, 7, 0, 6, 3, 3, 2...
[ "nonn", "cons" ]
A387660
[ 0, 1, 3, 6, 10, 15, 9, 16, 24, 33, 23, 12, 24, 37, 51, 36, 20, 37, 19, 38, 58, 79, 57, 34, 58, 83, 109, 82, 54, 83, 53, 84, 52, 85, 119, 154, 118, 81, 43, 82, 42, 83, 125, 168, 124, 169, 123, 76, 124, 75, 125, 74, ...
[ "nonn" ]
A126942
[ 0, 2, 4, 12, 42, 130, 404, 1282, 4044, 12726, 40114, 126450, 398478, 1255796, 3957784, 12473128, 39309510, 123885908, 390432440, 1230465890, 3877871274, 12221294900, 38515986858, 121384948432, 382550391954, 1205625604758, 3799585957042, 11974574363290 ]
[ "nonn" ]
A386543
[ 1, 0, 3, 3, 7, 3, 4, 2, 4, 2, 8, 7, 3, 2, 5, 8, 4, 8, 6, 1, 1, 2, 3, 1, 1, 3, 5, 9, 1, 6, 9, 9, 4, 0, 0, 7, 5, 5, 1, 0, 5, 3, 3, 4, 1, 3, 3, 2, 0, 4, 3, 0, 6, 2, 0, 4, 4, 8, 1, 1, 6, 4, 8, 0...
[ "nonn", "cons", "easy" ]
A079703
[ 68, 76, 124, 188, 236, 244, 284, 404, 412, 428, 436, 548, 596, 604, 628, 668, 724, 788, 844, 892, 908, 916, 964, 1028, 1052, 1076, 1084, 1132, 1244, 1252, 1268, 1324, 1348, 1388, 1396, 1412, 1468, 1516, 1532, 1556, 1588, 1604, 1684,...
[ "nonn" ]
A185810
[ 1, 2, 2, 3, 6, 4, 5, 12, 16, 8, 9, 24, 40, 40, 16, 18, 50, 92, 120, 96, 32, 39, 110, 212, 312, 336, 224, 64, 90, 254, 500, 784, 976, 896, 512, 128 ]
[ "nonn", "tabl" ]
A146923
[ 1, 1, 1, 1, 1, 1, 1, 6, 12, 19, 29, 56, 159, 456, 1350, 3940, 11848, 42451, 167584, 713562, 3187201 ]
[ "nonn" ]
A304177
[ 8, 22, 488, 10582, 30248, 1874888, 5100502, 116212808, 2458431382, 7203319208, 446489578088, 1184958825622, 27675150522248, 571147695518422, 1715412842801288, 106327921103157600, 275292004281053800, 6590615695552971000, 132690174915772400000, 408511845203181000000 ]
[ "easy", "nonn" ]
A060431
[ 1, 2, 3, 4, 5, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 14, 15, 16, 17, 18, 19, 20, 21, 21, 22, 23, 23, 24, 25, 26, 27, 27, 28, 29, 30, 31, 32, 33, 34, 34, 35, 36, 37, 38, 39, 40, 41, 41, 42, 43, 44, 45, 46, 46, 47...
[ "easy", "nonn" ]
A104165
[ 17, 59, 101, 311, 353, 479, 521, 941, 983, 1109, 1361, 1571, 1613, 1823, 1949, 2243, 2663, 2789, 2999, 3083, 3251, 3671, 3881, 4133, 4259, 4931, 5939, 5981, 6569, 6653, 7283, 7451, 7829, 8039, 8081, 8543, 8669, 9173, 9551, 9719, 9803, ...
[ "nonn" ]
A052576
[ 1, 2, 10, 48, 384, 3840, 46080, 645120, 10321920, 185794560, 3715891200, 81749606400, 1961990553600, 51011754393600, 1428329123020800, 42849873690624000, 1371195958099968000, 46620662575398910000 ]
[ "easy", "nonn" ]
A026959
[ 1, 14, 115, 640, 3049, 13494, 57491, 239768, 986976, 4027666, 16335660, 65955960, 265386251, 1064993622, 4264898875, 17051078256, 68080259516, 271537515786, 1082098938452, 4309269809044, 17151303222746, 68232856509950, 271350536990740, 1078796298028680, 42879067417489...
[ "nonn", "easy" ]
A062334
[ 7, 727, 757, 787, 797, 7027, 7057, 7127, 7177, 7187, 7207, 7237, 7247, 7297, 7307, 7417, 7457, 7477, 7487, 7507, 7517, 7537, 7547, 7577, 7607, 7687, 7717, 7727, 7757, 7817, 7867, 7877, 7907, 7927, 7937, 70067, 70117, 70157, 70177, 70207, ...
[ "nonn", "base", "easy" ]
A107972
[ 1, 3, 6, 6, 14, 20, 10, 25, 40, 50, 15, 39, 66, 90, 105, 21, 56, 98, 140, 175, 196, 28, 76, 136, 200, 260, 308, 336, 36, 99, 180, 270, 360, 441, 504, 540, 45, 125, 230, 350, 475, 595, 700, 780, 825, 55, 154, 286, 440, ...
[ "nonn", "tabl" ]
A130473
[ 1, 3, 6, 9, 14, 19, 24, 32, 40, 48, 56, 64, 77, 90, 103, 116, 129, 142, 155, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 441, 475, 509, 543, 577, 611, 645, 679, 713, 747, 781, 815, 849, 883, 917, 951, ...
[ "nonn" ]
A169102
[ 1, 41, 1640, 65600, 2624000, 104960000, 4198400000, 167936000000, 6717440000000, 268697600000000, 10747904000000000, 429916160000000000, 17196646400000000000, 687865856000000000000, 2.751463424e+22 ]
[ "nonn" ]
A208993
[ 1, 1, 1, 1, 2, 1, 1, 2, 3, 2, 1, 3, 5, 7, 3, 1, 3, 7, 16, 17, 5, 1, 4, 11, 33, 59, 51, 9, 1, 4, 15, 58, 159, 253, 155, 18, 1, 5, 19, 95, 351, 874, 1111, 508, 35, 1, 5, 25, 144, 683, 2354, 4935, 5067, 1683, 73...
[ "nonn", "tabl" ]
A130714
[ 1, 2, 3, 5, 6, 10, 11, 16, 19, 26, 27, 41, 42, 55, 64, 81, 83, 114, 116, 151, 168, 202, 210, 277, 289, 348, 382, 460, 478, 604, 623, 747, 812, 942, 1006, 1223, 1269, 1479, 1605, 1870, 1959, 2329, 2434, 2818, 3056, 3458, 3653...
[ "easy", "nonn" ]
A196771
[ 1, 3, 5, 4, 2, 8, 7, 2, 1, 4, 1, 5, 7, 7, 2, 1, 4, 1, 7, 8, 3, 0, 6, 3, 7, 1, 6, 1, 6, 3, 7, 5, 3, 0, 6, 8, 5, 9, 7, 7, 2, 6, 3, 2, 5, 7, 6, 7, 5, 5, 1, 4, 7, 7, 6, 4, 6, 9, 9, 2, 1, 1, 6, 1...
[ "nonn", "cons" ]
A287883
[ 1, 3, 6, 28, 33, 56, 63, 285, 318, 343, 354, 577, 590, 617, 652, 2874, 2891, 3124, 3143, 3368, 3405, 3616, 3639, 5862, 5917, 6130, 6463, 6690, 6719, 6954, 6985, 29207, 29518, 29735, 29792, 32025, 32062, 32281, 32594, 34819, 34860, 350...
[ "nonn", "base" ]
A183263
[ 1, 5, 157, 23285, 12358457, 25285926227, 195553837386094, 5666836462620367000, 6.120464143433328e+23, 2.4549222460170378e+29 ]
[ "nonn" ]
A343435
[ 2, 3, 4, 3, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17 ]
[ "nonn", "more" ]
A301797
[ 5, 21, 341, 5461, 1398101, 22369621, 5726623061, 91625968981, 23456248059221, 96076792050570580, 1537228672809129200, 6.296488643826193e+21, 1.6119010928195055e+24, 2.5790417485112088e+25, 6.602346876188694e+27, 2.7043212804868892e+31 ]
[ "nonn", "easy" ]
A274929
[ 1, 4, 6, 5, 14, 10, 11, 23, 16, 18, 21, 24, 19, 29, 46, 44, 30, 31, 58, 36, 33, 43, 41, 39, 40, 79, 78, 83, 47, 91, 57, 62, 56, 54, 61, 63, 59, 66, 115, 65, 73, 72, 75, 76, 131, 144, 92, 84, 81, 71, 82, 87, 164, ...
[ "nonn" ]
A259022
[ 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, 0, -1, 1, 1, -1, 1, -1, -1, 1, ...
[ "sign", "easy" ]
A267353
[ 1, 3, 6, 12, 15, 25, 28, 42, 45, 63, 66, 88, 91, 117, 120, 150, 153, 187, 190, 228, 231, 273, 276, 322, 325, 375, 378, 432, 435, 493, 496, 558, 561, 627, 630, 700, 703, 777, 780, 858, 861, 943, 946, 1032, 1035, 1125, 1128, ...
[ "nonn" ]
A031480
[ 5, 11, 17, 23, 29, 31, 32, 33, 34, 47, 53, 59, 65, 67, 68, 69, 70, 83, 89, 95, 101, 103, 104, 105, 106, 119, 125, 131, 137, 139, 140, 141, 142, 155, 161, 167, 173, 175, 176, 177, 178, 185, 187, 188, 189, 190, 193, 194, 1...
[ "nonn", "base" ]
A262609
[ 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 64, 72, 96, 108, 144, 192, 216, 288, 432, 576, 864, 1728 ]
[ "nonn", "fini", "full", "easy" ]
A209147
[ 1, 2, 2, 3, 5, 4, 5, 11, 12, 8, 8, 23, 33, 28, 16, 13, 45, 80, 90, 64, 32, 21, 86, 180, 245, 232, 144, 64, 34, 160, 387, 615, 696, 576, 320, 128, 55, 293, 801, 1454, 1913, 1880, 1392, 704, 256, 89, 529, 1614, 3284, 490...
[ "nonn", "tabl" ]
A200648
[ 1, 1, 2, 2, 3, 3, 3, 4, 3, 4, 4, 4, 5, 4, 4, 5, 4, 5, 5, 5, 6, 4, 5, 5, 5, 6, 5, 5, 6, 5, 6, 6, 6, 7, 5, 5, 6, 5, 6, 6, 6, 7, 5, 6, 6, 6, 7, 6, 6, 7, 6, 7, 7, 7, 8, 5, 6, 6, 6, 7, 6, 6, 7, 6...
[ "nonn", "base" ]
A339019
[ 1, 1, 1, 1, 3, 1, 1, 11, 6, 1, 1, 43, 46, 10, 1, 1, 171, 386, 130, 15, 1, 1, 683, 3366, 1870, 295, 21, 1, 1, 2731, 29866, 28234, 6455, 581, 28, 1, 1, 10923, 267086, 437350, 149031, 17941, 1036, 36, 1 ]
[ "nonn", "tabl" ]
A011406
[ 1, 1, 8, 5, 3, 3, 0, 7, 7, 1, 9, 8, 2, 4, 7, 8, 9, 5, 5, 7, 4, 3, 2, 6, 2, 2, 1, 4, 9, 4, 8, 3, 5, 5, 3, 4, 1, 5, 5, 7, 8, 0, 0, 6, 4, 6, 2, 9, 5, 5, 9, 9, 7, 0, 4, 9, 5, 6, 4, 6, 8, 8, 2, 7...
[ "nonn", "cons" ]
A078234
[ 5, 25, 75, 225, 3375, 57375, 2352375, 322275375, 27757255773375, 2.3322552325375374e+22, 5.272277223223333e+36 ]
[ "base", "nonn", "more" ]
A324004
[ 1, 1, 6, 3, 80, 72, 30240, 3024, 1814400, 25920, 2661120, 3991680, 871782912000, 87178291200, 241416806400, 44834549760, 254062448640000, 1077840691200, 170303140572364800, 1548210368839680, 1.1240007277776077e+21, 30879140873011200000, 4.103494720457933e+21, 3.32383072...
[ "nonn", "frac" ]
A078775
[ 1, 2, 4, 10, 14, 33, 75, 77, 91, 136, 143, 145, 207, 481, 580, 767, 793, 841, 1720 ]
[ "nonn" ]
A023632
[ 2, 3, 4, 2, 4, 2, 2, 4, 4, 2, 2, 4, 4, 4, 2, 2, 4, 2, 2, 4, 4, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 4, 4, 2, 2, 4, 4, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 4, 4, 2, 2, 4, 4, 4, 2, 2, 4, 4, 4, 2, 2, 4, 2, 2...
[ "nonn" ]
A202489
[ 14560, 132496, 1926288, 28005264, 349399008, 4359168576, 56953820952, 744118440129, 9593661694500, 123687762250000, 1600355267745000, 20706470360604900, 267678301470603000, 3460351852844410000 ]
[ "nonn" ]
A235065
[ 848, 4348, 22936, 125196, 685028, 3780180, 20896656, 116103776, 646515740, 3615891056, 20269554700, 114095152472, 643592714664, 3644779333856, 20679210497560, 117769364855184, 671728722382188, 3845058723067836 ]
[ "nonn" ]
A153363
[ 5, 8, 16, 28, 56, 100, 200, 360, 720, 1300, 2600, 4700, 9400, 17000, 34000, 61500, 123000, 222500, 445000, 805000, 1610000, 2912500, 5825000, 10537500, 21075000, 38125000, 76250000, 137937500, 275875000, 499062500, 998125000, 1805625000 ]
[ "easy", "nonn" ]
A016286
[ 1, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 1, 0, ...
[ "sign" ]
A054552
[ 1, 2, 11, 28, 53, 86, 127, 176, 233, 298, 371, 452, 541, 638, 743, 856, 977, 1106, 1243, 1388, 1541, 1702, 1871, 2048, 2233, 2426, 2627, 2836, 3053, 3278, 3511, 3752, 4001, 4258, 4523, 4796, 5077, 5366, 5663, 5968, 6281, 6602, 6931,...
[ "easy", "nonn" ]
A302739
[ 32, 2048, 85268, 3778433, 168799572, 7530280825, 336148647504, 15005851329729, 669868217032865, 29903422831135924, 1334911181586033700, 59591443914944390000, 2.66020721378207e+21, 1.1875366601350168e+23 ]
[ "nonn" ]
A066047
[ 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, ...
[ "nonn" ]
A238437
[ 1, 1, 2, 5, 11, 26, 60, 140, 325, 758, 1764, 4110, 9573, 22302, 51953, 121035, 281967, 656894, 1530351, 3565236, 8305876, 19350101, 45079691, 105021642, 244667733, 569999699, 1327922000, 3093645310, 7207231567, 16790608551, 39116897242, 91130208230, 21...
[ "nonn" ]
A032044
[ 1, 2, 1, 3, 3, 4, 10, 11, 17, 21, 51, 55, 88, 116, 161, 312, 381, 544, 748, 1055, 1331, 2493, 2925, 4279, 5626, 7916, 10187, 13872, 22179, 27568, 38062, 50687, 68345, 89337, 120063, 151999, 237592, 289136, 396905, 512496, 693993 ]
[ "nonn" ]
A257906
[ 0, 2, 5, 3, 7, 4, 9, 8, 15, 6, 14, 10, 19, 11, 21, 16, 31, 12, 23, 13, 25, 18, 35, 17, 33, 20, 39, 22, 43, 27, 53, 24, 47, 26, 51, 28, 55, 29, 57, 30, 59, 34, 67, 32, 63, 41, 81, 36, 71, 37, 73, 40, 79, 38, 7...
[ "nonn", "easy" ]
A083439
[ 3, 7, 19, 13, 61, 151, 31, 139, 67, 37, 79, 193, 163, 127, 157, 97, 43, 103, 307, 367, 457, 643, 73, 277, 223, 229, 373, 199, 109, 313, 211, 271, 241, 421, 181, 283, 397, 337, 349, 331, 577, 523, 463, 613, 439, 541, 571, 4...
[ "base", "nonn" ]
A328729
[ 1, -1, -2, -2, -4, 2, -6, 0, -3, 4, -10, 4, -12, 6, 8, 0, -16, 3, -18, 8, 12, 10, -22, 0, -5, 12, 0, 12, -28, -8, -30, 0, 20, 16, 24, 6, -36, 18, 24, 0, -40, -12, -42, 20, 12, 22, -46, 0, -7, 5, 32, 24, -52, 0,...
[ "sign", "mult" ]
A303303
[ 0, 1, 20, 23, 61, 66, 123, 130, 206, 215, 310, 321, 435, 448, 581, 596, 748, 765, 936, 955, 1145, 1166, 1375, 1398, 1626, 1651, 1898, 1925, 2191, 2220, 2505, 2536, 2840, 2873, 3196, 3231, 3573, 3610, 3971, 4010, 4390, 4431, 4830, ...
[ "nonn", "easy" ]
A227817
[ 9, 1, 0, 5, 2, 3, 2, 6, 2, 5, 0, 8, 5, 4, 9, 4, 0, 2, 9, 9, 7, 6, 6, 1, 7, 2, 4, 6, 7, 9, 9, 9, 7, 1, 8, 1, 3, 4, 7, 1, 5, 2, 4, 3, 8, 2, 9, 7, 0, 9 ]
[ "nonn", "cons", "more" ]
A313281
[ 1, 4, 9, 15, 21, 26, 30, 35, 41, 47, 52, 56, 60, 65, 71, 77, 82, 86, 91, 97, 103, 108, 112, 116, 121, 127, 133, 138, 142, 147, 153, 159, 164, 168, 172, 177, 183, 189, 194, 198, 203, 209, 215, 220, 224, 228, 233, 239, 245...
[ "nonn" ]
A108722
[ 11, 12, 14, 18, 26, 38, 62, 74, 102, 124, 196, 406, 670, 1090, 2080, 3840, 7880, 20280, 42600, 78200, 151200, 250600, 516800, 1360400, 3104400, 6159600, 20352200, 47244600, 158847200, 705347800, 2813903600, 11272396200, 50903322400 ]
[ "nonn", "base" ]
A140968
[ 4173031, 5221603, 7318757, 8367329, 8367343, 11513057, 13610221, 15707369, 16436759, 16436779, 16436809, 16436813, 16436821, 16436831, 16436857, 16436863, 16436891, 16436911, 16436921, 16436947, 16436969, 16436971 ]
[ "base", "nonn", "word" ]
A371424
[ 1, 2, 3, 4, 6, 5, 7, 8, 10, 9, 11, 12, 15, 14, 13, 16, 18, 20, 24, 22, 17, 19, 21, 25, 27, 26, 28, 23, 29, 30, 32, 33, 35, 34, 36, 31, 37, 39, 38, 42, 44, 40, 45, 46, 41, 43, 48, 50, 54, 52, 51, 49, 56, 58, 4...
[ "nonn", "tabl" ]
A313814
[ 1, 5, 10, 15, 22, 27, 33, 38, 45, 50, 55, 60, 65, 70, 75, 82, 87, 93, 98, 105, 110, 115, 120, 125, 130, 135, 142, 147, 153, 158, 165, 170, 175, 180, 185, 190, 195, 202, 207, 213, 218, 225, 230, 235, 240, 245, 250, 255, 2...
[ "nonn" ]
A054546
[ 1, 3, 2, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1...
[ "nonn", "easy" ]
A362751
[ 4, 36, 121, 484, 1764, 6561, 24336, 91204, 344569, 1313316, 5044516, 19509889, 75898944, 296735076, 1164925161, 4588978564, 18128468164, 71781662241, 284767380496, 1131461944804, 4501301127129, 17925960016836, 71447900614596, 284964683524609, 1137186233284864 ]
[ "nonn", "easy" ]
A358033
[ 2, 3, 4, 5, 6, 9, 12, 15, 20, 25, 30, 45, 60, 75, 100, 125, 150, 225, 300, 375, 500, 625, 750, 1125, 1500, 1875, 2500, 3125, 3750, 5625, 7500, 9375, 12500, 15625, 18750, 28125, 37500, 46875, 62500, 78125, 93750, 140625, 187500, 23...
[ "nonn", "easy" ]
A159614
[ 13, 17, 31, 71, 107, 113, 311, 701, 709, 907, 1009, 1021, 1031, 1033, 1061, 1069, 1091, 1097, 1103, 1109, 1151, 1181, 1201, 1213, 1231, 1301, 1321, 1409, 1511, 1601, 1811, 1901, 3011, 3019, 3023, 3049, 3067, 3083, 3089, 3109, 3121, 32...
[ "nonn", "base" ]
A171611
[ 0, 0, 0, 0, 1, 1, 1, 1, 2, 1, 2, 3, 2, 2, 3, 1, 3, 4, 2, 2, 4, 2, 3, 5, 3, 3, 5, 2, 4, 6, 2, 4, 6, 2, 4, 6, 4, 4, 7, 4, 4, 8, 4, 4, 9, 3, 5, 7, 3, 5, 8, 4, 5, 8, 5, 6, 10, 5, 6, 12, 4, 5, 10, ...
[ "nonn" ]
A124044
[ 0, 1, 1, 2, 1, 2, 1, 2, 3, 2, 1, 3, 1, 2, 3, 3, 1, 3, 2, 0, 4, 4, 2, 4, 1, 2, 4, 2, 2, 3, 2, 3, 4, 3, 1, 6, 3, 1, 4, 3, 1, 6, 2, 3, 3, 4, 2, 3, 4, 1, 6, 4, 1, 6, 2, 2, 7, 3, 2, 4, 4, 2, 4, 4...
[ "easy", "nonn" ]
A264023
[ 11, 12, 14, 16, 29, 49, 89, 109, 122, 128, 130, 136, 140, 142, 146, 152, 158, 160, 166, 170, 172, 178, 182, 188, 196, 299, 499, 899, 1009, 1049, 1126, 1130, 1136, 1138, 1148, 1150, 1156, 1162, 1166, 1172, 1178, 1180, 1190, 1192, ...
[ "nonn", "base", "easy" ]
A180622
[ 3, 6, 12, 19, 30, 38, 56, 68, 86, 100, 129, 143, 178, 197, 222, 246, 293, 313, 367, 392, 428, 460, 525, 551, 606, 643, 694, 730, 813, 841, 931, 977, 1034, 1084, 1151, 1188, 1296, 1351, 1419, 1467, 1586, 1627, 1752, 1811, 1880, ...
[ "nonn" ]
A230415
[ 0, 1, 1, 1, 0, 1, 2, 2, 2, 2, 1, 1, 0, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 1, 0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 0, 1, 2, 1, 2, 3, 3, 3, 3, 1, 1, 3, 3, 3, 3, 2, 2, 1, 2, 2, 0, 2, 2, 1...
[ "nonn", "base", "tabl" ]
A169877
[ 7, 16, 38, 100, 275, 784, 2280, 6724, 19964, 59536, 177989, 532900, 1596849, 4787344, 14356482, 43059844, 129162891, 387459856, 1162329651, 3486902500, 10460557755, 31381413904, 94143792483, 282430599364, 847290450408, 2541869016976, 7625603007884, 2287680202090...
[ "nonn" ]
A348698
[ 10077, 15117, 20157, 25197, 27717, 37797, 41577, 42837, 45357, 50397, 55437, 65517, 69297, 70557, 75597, 81897, 83157, 85677, 90717, 92397, 98277, 100797, 102957, 105837, 110877, 120117, 120957, 124737, 125997, 128517, 131037, 136077, 138597, 142797,...
[ "nonn" ]
A241682
[ 0, 2, 0, 8, 16, 72, 240, 968, 3696, 14792, 58480, 233928, 932976, 3731912, 14916720, 59666888, 238623856, 954495432, 3817806960, 15271227848, 61084212336, 244336849352, 977344601200, 3909378404808 ]
[ "nonn" ]
A076817
[ 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, ...
[ "nonn" ]
A283881
[ 7, 0, 8, 7, 7, 8, 4, 7, 7, 16, 7, 7, 16, 4, 7, 14, 24, 7, 7, 32, 4, 7, 21, 32, 7, 7, 64, 4, 7, 28, 40, 7, 7, 128, 4, 7, 35, 48, 7, 7, 256, 4, 7, 42, 56, 7, 7, 512, 4, 7, 49, 64, 7, 7, 1024, 4, 7, 56, ...
[ "nonn" ]
A001237
[ 31, 3661, 1217776, 929081776, 1413470290176, 3878864920694016, 17810567950611972000, 1.290899831804182e+23, 1.4097950308851438e+27, 2.233532138751498e+31, 4.97400843208279e+35, 1.5161356456130244e+40 ]
[ "nonn" ]
A356564
[ 1, 0, 2, 0, 28, -30, 888, -1260, 51728, -196560, 5293080, -22286880, 710229408, -4851269280, 138348035616, -1091188098000, 36482139114240, -379928382462720, 11812558481332992, -137793570801143040, 4609972759421554700, -67292912045817560000 ]
[ "sign" ]
A277364
[ 1, 0, 1, 1, 8, 16, 122, 365, 2795, 11051, 86472, 422005, 3403127, 19628064, 164029595, 1084948961, 9433737120, 69998462014, 635182667816, 5199414528808, 49344452550230, 439841775811967, 4371727233798927, 42000637216351224, 437489737355466560, 4493269587087403000 ]
[ "nonn" ]
A314961
[ 1, 5, 9, 14, 20, 25, 30, 36, 41, 45, 50, 55, 59, 64, 70, 75, 80, 86, 91, 95, 100, 105, 109, 114, 120, 125, 130, 136, 141, 145, 150, 155, 159, 164, 170, 175, 180, 186, 191, 195, 200, 205, 209, 214, 220, 225, 230, 236, 241...
[ "nonn" ]
A390442
[ 1, 48, 1194, 22502, 363982, 5351260, 73858790, 974287906, 12422233000, 154239024036, 1874789312770, 22394201768192, 263628273676370, 3065376975230230, 35267028900050370, 402026048037526500, 4546049746278221300, 51040706877167590000, 569432330468205700000 ]
[ "nonn", "new" ]
A278252
[ 1, 4, 6, 12, 6, 24, 60, 120, 30, 60, 30, 60, 30, 240, 120, 240, 30, 420, 210, 420, 30, 120, 180, 360, 180, 1260, 420, 420, 30, 480, 240, 480, 210, 4620, 2310, 420, 30, 840, 420, 840, 30, 420, 2310, 4620, 210, 240, 360, 360...
[ "nonn" ]
A385416
[ 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 1, 4, 1, 2, 2, 2, 1, 5, 1, 3, 2, 2, 2, 3, 1, 2, 2, 4, 1, 5, 1, 2, 2, 2, 1, 5, 1, 2, 2, 2, 1, 4, 2, 4, 2, 2, 1, 6, 1, 2, 2, 4...
[ "nonn" ]
A292629
[ 0, 1, 4, 30, 304, 3885, 59976, 1085973, 22571200, 529712667, 13856212600, 399773871068, 12612288989664, 431948624278795, 15960564546516240, 632898895109081300, 26809122466181750000, 1.2081774443520645e+21, 5.77191048619151e+22, 2.913802658820379e+24, 1.5499121413872885e+26 ]
[ "nonn" ]
A095975
[ 1, 2, 5, 11, 27, 60, 147, 344, 839, 2031, 5017, 12379, 30921, 77407, 195121, 493451, 1253613, 3194303, 8166757, 20933754, 53798919, 138566312, 357647565, 924834079, 2395702801, 6215748612, 16150985071, 42024182520, 109485000777, 285578913962, 745728542725 ...
[ "easy", "nonn" ]
A315987
[ 1, 6, 9, 14, 19, 23, 28, 32, 38, 44, 46, 51, 57, 60, 65, 70, 76, 82, 83, 88, 95, 97, 102, 108, 114, 120, 120, 125, 133, 134, 139, 146, 152, 158, 157, 162, 171, 171, 176, 184, 190, 196, 194, 199, 209, 208, 213, 222, 228, ...
[ "nonn" ]
A227646
[ 8, 9, 16, 25, 32, 36, 125, 128, 144, 216, 243, 289, 729, 1444, 1681, 2304, 3600, 5832, 45369, 121104, 363609, 7257636, 11289600, 6234681600 ]
[ "nonn" ]
A387153
[ 30030, 39270, 43890, 46410, 51870, 53130, 62790, 66990, 67830, 71610, 79170, 82110, 84630, 85470, 91770, 94710, 99330, 101010, 103530, 108570, 111930, 117390, 122430, 128310, 136290, 140910, 144690, 154770, 161070, 164010, 166530, 168630, 182490, 191...
[ "nonn" ]
A337774
[ 0, 1, 2, 2, 3, 4, 5, 5, 4, 5, 6, 7, 7, 8, 9, 7, 7, 8, 9, 9, 10, 11, 11, 11, 9, 10, 12, 12, 11, 12, 13, 13, 13, 13, 14, 13, 13, 14, 14, 13, 14, 16, 17, 16, 15, 16, 17, 17, 15, 15, 16, 16, 16, 18, 19, 19, 1...
[ "nonn" ]
A286977
[ 1, 520, 32253, 1853532, 108110791, 6394436704, 382399996325, 23061514189084, 1399727072882973, 85393260809630400, 5231506248052899000, 321628304145152740000, 1.983250564247845e+22, 1.2260746101876e+24 ]
[ "nonn" ]
A346174
[ 0, 1, 6, 30, 120, 420, 1344, 4032, 11520, 31680, 84480, 219648, 559104, 1397760, 3440640, 8355840, 20054016, 47628288, 112066560, 261488640, 605552640, 1392771072, 3183476736, 7235174400, 16357785600, 36805017600, 82443239424, 183911841792, 408692981760, 904...
[ "nonn", "easy" ]
A282228
[ 0, 0, 9506, 1077872, 107299718, 9825363032, 858207069508, 72625487040016, 6007728913623056, 488523634696859100, 39196259623189230000, 3.1112462676131e+21, 2.4478948404422362e+23 ]
[ "nonn" ]
A183873
[ 1, 2, 4, 7, 9, 13, 16, 20, 25, 29, 35, 40, 46, 53, 59, 67, 74, 82, 91, 99, 109, 118, 128, 139, 149, 161, 172, 184, 197, 209, 223, 236, 250, 265, 279, 295, 310, 326, 343, 359, 377, 394, 412, 431, 449, 469, 488, 508, 529, ...
[ "nonn", "easy" ]
A059920
[ 10, 1, 20, 1, 10, 30, 1, 2, 11, 40, 1, 2, 10, 20, 50, 1, 2, 3, 11, 21, 60, 1, 2, 3, 10, 12, 30, 70, 1, 2, 3, 4, 11, 20, 31, 80, 1, 2, 3, 4, 10, 12, 21, 40, 90, 1, 2, 3, 4, 5, 11, 13, 22, 41, 100, 1, 2, ...
[ "base", "easy", "tabl", "nonn" ]
A055264
[ 0, 1, 3, 6, 9, 10, 12, 15, 18, 19, 21, 24, 27, 28, 30, 33, 36, 37, 39, 42, 45, 46, 48, 51, 54, 55, 57, 60, 63, 64, 66, 69, 72, 73, 75, 78, 81, 82, 84, 87, 90, 91, 93, 96, 99, 100, 102, 105, 108, 109, 111, 114, 11...
[ "easy", "nonn", "base" ]
A228521
[ 70, 1372210, 26898060350, 527255777608490, 10335267725783560000, 2.0259191743355358e+23, 3.9712067551972495e+27, 7.784359461278456e+31, 1.5258901376285964e+36, 2.9910498399952153e+40 ]
[ "nonn", "easy" ]
A258462
[ 1, 29, 492, 6401, 70880, 704676, 6490951, 56524414, 471750267, 3810085912, 29989229859, 231255237311, 1754111872429, 13128442913712, 97189645384884, 713050007285941, 5192646586465458, 37581376345088460, 270593146237918820, 1939929376872664000 ]
[ "nonn" ]