id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A222908
[ 5, 14, 45, 373, 1202, 18981, 82020, 1506810, 6857704, 129852811, 597088326, 11405469595, 52673539459, 1011491590878, 4687412959525, 90358383040770, 419948850379586, 8119819516703235, 37831903319054460, 733292643562817000 ]
[ "nonn" ]
A024139
[ 1, 10, -3975, -530110, -16762575, -243979574, -2175010775, -13821800030, -68505117855, -280071588790, -974062575399, -2853116706110, -5777672071535, 11224627021450, 323055921207945, 4047501831525026, 45668254886861500 ]
[ "sign", "easy" ]
A296056
[ 1, -2, -1400, -679140000, -122489812645200000, -6.931927717187904e+27, -1.1428737517829159e+41, -5.276559973392268e+56, -6.662180733287014e+74 ]
[ "sign" ]
A274074
[ 2, 5, 37, 215, 1297, 7775, 46657, 279935, 1679617, 10077695, 60466177, 362797055, 2176782337, 13060694015, 78364164097, 470184984575, 2821109907457, 16926659444735, 101559956668417, 609359740010495, 3656158440062977, 21936950640377856, 131621703842267140 ]
[ "nonn", "easy" ]
A390084
[ 1, 2, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16 ]
[ "nonn", "more", "changed" ]
A013199
[ 0, 1, 0, -3, 16, -35, 0, 1057, -9984, 59865, 0, -5446683, 85897216, -726781835, 0, 133713611977, -2848077840384, 32440474082865, 0, -10034804733270964, 271157029126537200, -3854719922524818000, 0, 1.8002594944569906e+21 ]
[ "sign" ]
A298889
[ 0, 1, 1, 11, 219, 2963, 74725, 5719782, 724538480, 145951109194 ]
[ "nonn" ]
A017800
[ 1, 84, 3486, 95284, 1929501, 30872016, 406481544, 4529365776, 43595145594, 368136785016, 2761025887620, 18574174153080, 112992892764570, 625806790696080, 3173734438530120, 14810760713140560, 63871405575418664, 255485622301674660, 950974260789566800 ]
[ "nonn", "fini", "full", "easy" ]
A211485
[ 1, 2, 3, 5, 7, 11, 13, 16, 17, 19, 23, 29, 30, 31, 37, 41, 42, 43, 47, 53, 59, 61, 66, 67, 70, 71, 73, 78, 79, 81, 83, 89, 97, 101, 102, 103, 105, 107, 109, 110, 113, 114, 127, 128, 130, 131, 137, 138, 139, 149, 151,...
[ "nonn", "easy" ]
A012594
[ 1, 0, 1, 6, 25, 140, 1225, 11410, 110353, 1260696, 16597745, 233501598, 3534940649, 58867014180, 1060745261433, 20315286728490, 414362268698017, 9016753267197744, 207836963025430370, 5046234392527983000 ]
[ "nonn" ]
A250724
[ 50, 110, 208, 365, 600, 942, 1418, 2065, 2918, 4022, 5420, 7165, 9308, 11910, 15030, 18737, 23098, 28190, 34088, 40877, 48640, 57470, 67458, 78705, 91310, 105382, 121028, 138365, 157508, 178582, 201710, 227025, 254658, 284750, 317440, 352877 ]
[ "nonn" ]
A185746
[ 344, 12656, 273928, 6315600, 145680504, 3364965408, 77691779712, 1793861476320, 41418279791200, 956315991414968, 22080608517930970, 509824185307237000, 11771444685645427000, 271793504996468880000, 6.275500804116966e+21 ]
[ "nonn" ]
A312439
[ 1, 4, 8, 14, 18, 22, 24, 30, 36, 40, 46, 44, 52, 58, 60, 70, 66, 74, 80, 80, 92, 88, 98, 102, 100, 114, 108, 122, 126, 120, 136, 128, 144, 150, 142, 158, 148, 166, 172, 164, 182, 168, 188, 194, 184, 206, 190, 210, 216, ...
[ "nonn" ]
A212010
[ 1, 2, 3, 3, 5, 6, 6, 9, 11, 12, 8, 14, 17, 19, 20, 15, 23, 29, 32, 34, 35, 19, 34, 42, 48, 51, 53, 54, 32, 51, 66, 74, 80, 83, 85, 86, 42, 74, 93, 108, 116, 122, 125, 127, 128, 64, 106, 138, 157, 172, 180, 186, 1...
[ "nonn", "tabl" ]
A285018
[ 1, 6, 24, 432, 10368, 6912, 248832, 1492992, 23887872, 1289945088, 15479341056, 30958682112, 2229025112064, 13374150672384, 5944066965504, 106993205379072, 10271347716390912, 20542695432781824, 2218611106740437000, 13311666640442622000, 106493333123540980000 ]
[ "nonn", "frac" ]
A164124
[ 0, 2, 2, 10, 14, 42, 34, 20, 130, 56, 130, 750, 260, 118, 48, 168, 44, 48, 3010, 224, 76, 368, 312, 112, 230, 616, 780, 152, 160, 272, 9186, 720, 192, 1144, 176, 192, 1356, 1384, 128, 192, 720, 448, 1718, 192, 1240, 624, 320...
[ "nonn", "less", "base" ]
A354326
[ 1, 0, 1, 6, 38, 280, 2538, 27524, 341912, 4754880, 73322360, 1244282512, 23048700912, 462565343552, 9996300546512, 231444311970720, 5715911385442688, 149988948332148740, 4167328800543910400, 122218355207805620000, 3.773036019063285e+21 ]
[ "nonn" ]
A176782
[ 1, 2, 6, 212, 9528116, 865009958745459900000, 6.472369794043294e+62 ]
[ "nonn" ]
A242026
[ 0, 12, 48, 240, 960, 4032, 16128, 65280, 261120, 1047552, 4190208, 16773120, 67092480, 268419072, 1073676288, 4294901760, 17179607040, 68719214592, 274876858368, 1099510579200, 4398042316800, 17592181850112, 70368727400448, 281474959933440, 1125899839733760 ]
[ "nonn", "easy" ]
A389598
[ 7, 15, 23, 30, 31, 37, 39, 42, 43, 45, 47, 52, 54, 55, 58, 59, 60, 61, 62, 63, 71, 75, 79, 85, 87, 91, 93, 94, 95, 101, 103, 105, 106, 107, 109, 110, 111, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127...
[ "nonn" ]
A105206
[ 3, 5, 6, 8, 9, 10, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26 ]
[ "nonn", "more" ]
A018544
[ 1, 2, 4, 151, 302, 604 ]
[ "nonn", "fini", "full", "easy" ]
A306786
[ 2, 3, 7, 11, 103, 4441, 41213, 4956803 ]
[ "nonn", "more" ]
A060586
[ 0, 1, 1, 3, 3, 2, 3, 2, 3, 7, 6, 7, 6, 7, 7, 5, 5, 4, 7, 7, 6, 5, 4, 5, 6, 7, 7, 15, 15, 14, 13, 12, 13, 14, 15, 15, 12, 13, 13, 15, 15, 14, 15, 14, 15, 11, 10, 11, 10, 11, 11, 9, 9, 8, 15, 14, 15, 14, ...
[ "base", "nice", "nonn" ]
A200740
[ 1, 1, 3, 12, 54, 261, 1324, 6954, 37493, 206316, 1154050, 6542485, 37507919, 217081155, 1266646114, 7443100944, 44008522719, 261631301144, 1562969609155, 9377744249277, 56486588669929, 341452466500382, 2070684006442310, 12594325039504368, 76808163066135790 ]
[ "nonn" ]
A314242
[ 1, 5, 11, 17, 23, 28, 35, 41, 45, 51, 56, 63, 69, 73, 81, 86, 91, 97, 101, 109, 114, 119, 127, 131, 137, 142, 147, 155, 159, 165, 172, 177, 183, 187, 193, 200, 205, 211, 217, 223, 228, 233, 239, 245, 251, 256, 263, 269, ...
[ "nonn" ]
A308191
[ 5, 6, 8, 7, 10, 16, 17, 30, 29, 54, 53, 102, 101, 198, 197, 390, 389, 774, 773, 1542, 3080, 3079, 6154, 12304, 24604, 36901, 73798, 147592, 295180, 295517, 591030, 1182056, 1574849, 3149694, 4728211, 6299383, 12598762, 25197520, 25197533, ...
[ "nonn" ]
A245917
[ 1, 1, 12, 249, 9184, 488745, 35463456, 3212948809, 454190410752, 85278734539281, 19295679317593600, 4754101825771791000, 1.391380506872608e+21, 4.670806576048022e+23, 1.774254780311594e+26, 7.269405177098286e+28 ]
[ "nonn" ]
A232442
[ 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 2, 1, 1, 0, 0, 1, 1, 6, 1, 2, 2, 0, 0, 1, 2, 3, 0, 1, 2, 0, 1, 2, 4, 1, 1, 0, 1, 2, 2, 2, 4, 0, 0, 1, 2, 0, 3, 3, 3, 2, 0, 1...
[ "nonn" ]
A077970
[ 1, -1, 3, -7, 15, -35, 79, -179, 407, -923, 2095, -4755, 10791, -24491, 55583, -126147, 286295, -649755, 1474639, -3346739, 7595527, -17238283, 39122815, -88790435, 201512631, -457339131, 1037945263, -2355648787, 5346217575, -12133405675, 27537138399, -6...
[ "sign", "easy" ]
A099305
[ 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 2, 1, 3, 1, 2, 1, 2, 1, 2, 1, 3, 1, 2, 1, 3, 1, 3, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 2, 1, 3, 1, 3, 1, 2, 2, 2, 1, 3, 1, 3, 1, 2, 3, 3, 1, 3, 1, 2, 1, 3, 1, 2...
[ "nonn" ]
A144858
[ 0, 1, 120, 2016, 32640, 130816, 523776, 2096128, 8386560, 134209536, 536854528, 2147450880, 34359607296, 549755289600, 2199022206976, 8796090925056, 35184367894528, 140737479966720, 562949936644096, 2251799780130816 ]
[ "nonn" ]
A150531
[ 1, 2, 7, 25, 107, 446, 2007, 8826, 40717, 184748, 867389, 4016951, 19078567, 89576514, 428852271, 2033468091, 9793501197, 46784585272, 226364034325, 1087647799101, 5281738819743, 25495198204130, 124172939105885, 601634383555610, 2937357566671603, 14275931732980038, ...
[ "nonn", "walk" ]
A277676
[ 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 23, 25, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 39, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 56, 57, 58, 60, 61, 62, 63, 65, 66, 67, 68, 69, ...
[ "nonn", "base", "easy" ]
A046640
[ 1, 1, 1, 1, 1, 2, 1, 2, 2, 4, 1, 4, 1, 6, 5, 5, 1, 8, 1, 8, 7, 10, 1, 10, 4, 12, 7, 12, 1, 16, 1, 12, 11, 16, 9, 17, 1, 18, 13, 18, 1, 24, 1, 20, 17, 22, 1, 24, 6, 26, 17, 24, 1, 30, 13, 26, 19, 28, 1...
[ "nonn" ]
A279628
[ 1, 1, -1, -1, 2, 0, -1, 0, -1, 2, 2, -6, 3, 3, -8, 11, -4, -16, 30, -15, -24, 58, -55, -7, 108, -158, 58, 173, -357, 268, 170, -713, 831, -98, -1235, 2070, -1154, -1641, 4463, -4207, -894, 8392, -11527, 3917, 13077, -26782, ...
[ "sign", "easy" ]
A174250
[ 1, 1, 6, 132, 2369, 33344, 451206, 5850115, 81459922, 1144259389, 15946621499 ]
[ "nonn", "more" ]
A186390
[ 1, 2, 3, 5, 7, 9, 11, 13, 16, 19, 21, 24, 28, 31, 34, 38, 42, 46, 50, 54, 59, 64, 68, 73, 79, 84, 89, 95, 101, 107, 113, 119, 126, 133, 139, 146, 154, 161, 168, 176, 184, 192, 200, 208, 217, 226, 234, 243, 253, 262, ...
[ "nonn" ]
A375928
[ 1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 14, 18, 21, 22, 25, 26, 29, 34, 35, 37, 39, 42, 43, 48, 49, 50, 55, 62, 65, 66, 69, 70, 73, 80, 83, 84, 86, 91, 92, 101, 102, 107, 112, 115, 116, 119, 124, 125, 134, 135, 138, 139,...
[ "nonn" ]
A314940
[ 1, 5, 9, 14, 20, 23, 30, 35, 38, 44, 48, 53, 56, 66, 69, 72, 78, 83, 87, 91, 101, 101, 106, 113, 115, 122, 126, 134, 136, 140, 146, 148, 158, 160, 168, 170, 175, 180, 183, 193, 192, 202, 205, 207, 215, 218, 226, 227, 236...
[ "nonn" ]
A146383
[ 1, 1, 1, 1, 1, 6, 1, 20, 13, 138, 69, 1792, 528, 26977, 7033, 655185, 141904, 24548006, 4322355, 1409242126, 197401178, 123270232283, 13868215311, 16071746508178, 1479290583806, 3212023185510693 ]
[ "nonn" ]
A331066
[ 1, 3, 7, 9, 8, 7, 3 ]
[ "nonn", "fini", "full" ]
A177371
[ 1, 18, 98, 812, 5748, 43120, 316600, 2343120, 17290256, 127726400, 943159584, 6965532736, 51439836352, 379886330112, 2805462584192, 20718413985536, 153005867110656, 1129951564794880, 8344715027364352, 61625891492889600 ]
[ "nonn" ]
A035473
[ 1, 16, 128, 688, 3072, 11472, 36224, 99184, 241664, 535440, 1097344, 2107952, 3834880, 6661200, 11119488, 17932016, 28057600, 42745616, 63597696, 92637616, 132389888, 185967568, 257169792, 350589552, 471732224, 627145360, 824560256, 1073045808, 1383175168 ]
[ "nonn", "easy" ]
A018863
[ 1, 216, 36, 46656, 5.002173871462903e+67, 6, 7776, 8.020496723306241e+31 ]
[ "nonn", "base" ]
A245652
[ 1, 1, 3, 6, 5, 5, 9, 9, 1, 8, 7, 8, 6, 6, 0, 0, 6, 4, 3, 2, 3, 6, 0, 3, 4, 3, 6, 6, 1, 4, 0, 9, 5, 3, 4, 4, 7, 3, 4, 3, 8, 2, 2, 8, 7, 5, 0, 3, 4, 3, 8, 3, 3, 2, 6, 1, 6, 7, 2, 6, 3, 8, 1, 5...
[ "nonn", "cons", "more" ]
A311417
[ 1, 4, 8, 12, 17, 21, 24, 29, 35, 40, 44, 48, 52, 55, 58, 63, 69, 75, 79, 83, 88, 89, 92, 98, 103, 109, 113, 118, 124, 124, 126, 133, 138, 143, 146, 152, 160, 159, 161, 168, 173, 178, 179, 185, 195, 194, 196, 204, 208, ...
[ "nonn" ]
A078904
[ 0, 3, 18, 81, 336, 1359, 5454, 21837, 87372, 349515, 1398090, 5592393, 22369608, 89478471, 357913926, 1431655749, 5726623044, 22906492227, 91625968962, 366503875905, 1466015503680, 5864062014783, 23456248059198, 93824992236861 ]
[ "nonn" ]
A027152
[ 1, 1, 5, 7, 21, 31, 123, 209, 601, 971, 3647, 6589, 18565, 31375, 114203, 213073, 593073, 1030675, 3674615, 6997477, 19315165, 34221463, 120206611, 232218425, 637066249, 1144951835, 3976689519, 7765255757, 21202165941, 38528688671 ]
[ "nonn" ]
A026247
[ 1, 5, 2, 3, 9, 10, 4, 13, 14, 6, 17, 18, 7, 8, 22, 26, 27, 11, 30, 31, 12, 34, 35, 39, 15, 16, 43, 47, 48, 19, 51, 52, 20, 21, 56, 60, 23, 24, 64, 65, 25, 68, 69, 73, 28, 29, 77, 81, 82, 32, 85, 86, 33, 89, 9...
[ "nonn" ]
A296475
[ 3, 9, 7, 5, 7, 8, 9, 5, 5, 7, 9, 7, 1, 0, 7, 3, 4, 7, 3, 4, 5, 4, 9, 6, 5, 3, 2, 6, 8, 4, 2, 9, 1, 7, 0, 7, 3, 1, 4, 4, 1, 2, 4, 7, 5, 0, 0, 4, 2, 6, 5, 2, 1, 5, 9, 1, 9, 2, 3, 7, 4, 8, 6, 6...
[ "nonn", "easy", "cons" ]
A068241
[ 1, 290493, 10221446382, 25410195205090, 10988934663584656, 1515888422040128800, 94793386050673790000, 3.330373652089797e+21, 7.55434495484678e+22, 1.216257376373887e+24, 1.4865437328242112e+25, 1.4490713918844318e+26 ]
[ "nonn" ]
A204890
[ 1, 3, 2, 5, 4, 2, 9, 8, 6, 4, 11, 10, 8, 6, 2, 15, 14, 12, 10, 6, 4, 17, 16, 14, 12, 8, 6, 2, 21, 20, 18, 16, 12, 10, 6, 4, 27, 26, 24, 22, 18, 16, 12, 10, 6, 29, 28, 26, 24, 20, 18, 14, 12, 8, 2, 35, 34,...
[ "nonn", "tabl", "easy" ]
A339842
[ 9, 25, 30, 49, 63, 70, 75, 84, 100, 121, 147, 154, 165, 169, 175, 189, 196, 198, 210, 220, 250, 264, 273, 280, 286, 289, 325, 343, 351, 361, 363, 364, 385, 390, 441, 442, 462, 468, 484, 490, 495, 507, 520, 525, 529, 550, 561...
[ "nonn" ]
A384633
[ 1, 1, 4, 8, 26, 62, 180, 460, 1276, 3356, 9136, 24320, 65688, 175752, 473136, 1268624, 3410448, 9152784, 24590912, 66021248, 177335712, 476185568, 1278917440, 3434413760, 9223575488, 24769781184, 66521273088, 178644161536, 479759612288, 1288410499200 ]
[ "nonn", "easy", "walk" ]
A030376
[ 2, 9, 12, 14, 16, 17, 18, 25, 36, 48, 53, 56, 59, 60, 62, 72, 76, 79, 82, 84, 85, 88, 91, 94, 96, 97, 100, 101, 103, 104, 106, 107, 108, 109, 110, 112, 115, 118, 120, 121, 132, 144, 149, 152, 155, 156, 158, 168, 183, 1...
[ "nonn" ]
A202295
[ 1, 1, 3, 14, 90, 737, 7336 ]
[ "nonn", "more" ]
A032696
[ 3, 57, 297, 2189, 25697, 76721, 123747, 124443, 132653, 218207, 244099, 261023, 267787, 297059, 304389, 346623, 366989, 411971, 462751, 551057, 596897, 643181, 647193, 665967, 671573, 688143, 701207, 742197, 748563, 867003, 872313, 877331 ]
[ "nonn", "base" ]
A179045
[ 1, 2, 1, 3, 1, 1, 5, 2, 1, 1, 7, 3, 1, 1, 1, 10, 4, 2, 1, 1, 1, 13, 5, 3, 1, 1, 1, 1, 18, 7, 4, 2, 1, 1, 1, 1, 23, 9, 5, 3, 1, 1, 1, 1, 1, 30, 12, 6, 4, 2, 1, 1, 1, 1, 1, 37, 15, 7, 5, 3, 1, 1, ...
[ "nonn", "tabl" ]
A074842
[ 111, 222, 333, 444, 555, 666, 777, 888, 999, 101010, 111111, 121212, 131313, 141414, 151515, 161616, 171717, 181818, 191919, 202020, 212121, 222222, 232323, 242424, 252525, 262626, 272727, 282828, 292929, 303030, 313131, 323232, 333333 ]
[ "easy", "nonn", "base" ]
A345692
[ 0, 2, 24, 68, 364, 504, 2040, 3606, 7664, 10422, 25764, 34226, 70836, 89994, 128532, 177276, 316844, 375952, 623024, 757604, 986742, 1188760, 1828860, 2093672, 2885342, 3379568, 4347890, 5089220, 7134860, 7835684, 10700654, 12422758, 14837078, 168124...
[ "nonn" ]
A269084
[ 7, 30, 114, 428, 1531, 5387, 18590, 63347, 213490, 713237, 2365217, 7794642, 25549763, 83359179, 270860625, 876943006, 2830104798, 9107202178, 29230933367, 93601324315, 299085155918, 953808773503, 3036347307176, 9649992762591 ]
[ "nonn" ]
A062840
[ 0, 1, 2, 9, 1001, 29792, 1000001, 1000000001, 1000000000001, 1000000000000001, 1000000000000000000, 1e+21, 1e+24, 1e+27, 1e+30 ]
[ "base", "nonn" ]
A385903
[ 0, 0, 0, 6, 96, 1200, 14760, 196560, 2983680, 52375680, 1048723200, 23431161600, 574602336000, 15324698188800, 442124703820800, 219784143804825600, 457476800901120000, 16256338213699584000, 613800902479564800000, 2.453727649366632e+22 ]
[ "nonn" ]
A250550
[ 1, 20, 810, 28080, 596700, 5012280, 29238300, 1938081600, 7994586600, 328666338000, 14822851843800, 48511151488800, 367876232123400, 20997243402735600, 427443883555689000, 55624697380046995000, 59101240966299935000, 479763014902905300000 ]
[ "nonn", "frac" ]
A309751
[ 0, 0, 2, 2, 10, 10, 10, 74, 202, 202, 714, 714, 714, 714, 8906, 25290, 58058, 123594, 254666, 516810, 516810, 1565386, 1565386, 5759690, 14148298, 14148298, 47702730, 47702730, 181920458, 450355914, 987226826, 987226826, 3134710474, 7429677770, 742...
[ "nonn" ]
A327072
[ 1, 1, 0, 0, 1, 0, 1, 0, 3, 0, 10, 12, 0, 16, 0, 253, 200, 150, 0, 125, 0, 11968, 7680, 3600, 2160, 0, 1296, 0, 1047613, 506856, 190365, 68600, 36015, 0, 16807, 0, 169181040, 58934848, 16353792, 4695040, 1433600, 688128, 0, 262144,...
[ "nonn", "tabl" ]
A289144
[ 1, 2, 0, 4, -1, 6, -2, 0, -3, 10, -4, 12, -5, -2, -6, 16, -7, 18, -8, -4, -9, 22, -10, 0, -11, -6, -12, 28, -13, 30, -14, -8, -15, -2, -16, 36, -17, -10, -18, 40, -19, 42, -20, -12, -21, 46, -22, 0, -23, -14, -24, ...
[ "sign" ]
A016787
[ 1, 4194304, 1977326743, 100000000000, 1792160394037, 17592186044416, 116490258898219, 584318301411328, 2384185791015625, 8293509467471872, 25408476896404830, 70188843638032380, 177917621779460400, 419430400000000000, 929293739471222700, 1951354384207722500 ]
[ "nonn", "easy" ]
A195106
[ 21, 63, 77, 105, 147, 189, 221, 315, 437, 441, 525, 539, 567, 735, 847, 945, 1029, 1323, 1517, 1575, 1701, 2021, 2205, 2625, 2835, 2873, 3087, 3675, 3757, 3773, 3969, 4725, 4757, 5103, 5145, 5929, 6557, 6615, 7203, 7875, 8303, 8505, ...
[ "nonn" ]
A055979
[ 4, 11, 134, 373, 4552, 12671, 154634, 430441, 5253004, 14622323, 178447502, 496728541, 6061962064, 16874148071, 205928262674, 573224305873, 6995498968852, 19472752251611, 237641036678294, 661500352248901, 8072799748093144, 22471539224211024 ]
[ "nonn", "easy", "nice" ]
A144187
[ 1, 1, 1, 6, 12, 20, 60, 1680, 4032, 181440, 907200, 2851200, 17107200, 62270208, 242161920, 29059430400, 232475443200, 1077840691200, 277159034880, 52660216627200, 283555012608000, 65501207912448000, 720513287036928000 ]
[ "nonn", "frac" ]
A051923
[ 1, 9, 42, 140, 378, 882, 1848, 3564, 6435, 11011, 18018, 28392, 43316, 64260, 93024, 131784, 183141, 250173, 336490, 446292, 584430, 756470, 968760, 1228500, 1543815, 1923831, 2378754, 2919952, 3560040, 4312968, 5194112, 6220368, 7410249, 8783985, ...
[ "nonn", "easy" ]
A259642
[ 18, 29, 29, 69, 64, 69, 133, 171, 171, 133, 236, 365, 581, 365, 236, 472, 813, 1483, 1483, 813, 472, 940, 1964, 3849, 4146, 3849, 1964, 940, 1781, 4499, 11261, 12348, 12348, 11261, 4499, 1781, 3433, 10188, 30957, 42524, 44500, 42524, ...
[ "nonn", "tabl" ]
A041178
[ 9, 10, 189, 199, 3771, 3970, 75231, 79201, 1500849, 1580050, 29941749, 31521799, 597334131, 628855930, 11916740871, 12545596801, 237737483289, 250283080090, 4742832924909, 4993116004999, 94618921014891, 99612037019890, 1887635587372911, 1987247624392801 ]
[ "nonn", "cofr", "frac", "easy" ]
A282691
[ 0, 1, 2, 3, 2, 3, 2, 5, 4, 5, 4, 5, 4, 5, 6, 7, 6, 5, 6, 7, 6, 7, 6, 9, 6, 7, 8, 9, 8, 9, 8 ]
[ "nonn", "more" ]
A390495
[ 0, 2, 0, 3, 2, 0, 5, 5, 0, 7, 2, 0, 3, 0, 2, 5, 0, 11, 5, 0, 13, 2, 7, 0, 8, 0, 2, 0, 17, 5, 0, 19, 7, 0, 3, 7, 0, 2, 11, 0, 23, 5, 0, 5, 0, 2, 13, 0, 3, 0, 0, 9, 0, 29, 10, 0, 31, 2, 0, 3, 11, ...
[ "nonn", "tabf", "new" ]
A137975
[ 1, 2, 8, 32, 167, 928, 5924, 40211, 293370, 2255406, 18201706, 153176115, 1339271815, 12124484941, 113362749476, 1092329626380, 10827837622018, 110249198676581, 1151562885666429, 12324860339781102, 135026515460855980, 1512882677086124000, 17321462912397361000, 202503301...
[ "nonn" ]
A234604
[ 2, 3, 4, 4, 5, 6, 6, 7, 17, 35, 62, 103, 164, 256, 391, 589, 880, 1303, 1919, 2814, 4112, 5993, 8716, 12655, 18353, 26591, 38499, 55710, 80583, 116523, 168453, 243485, 351889, 508506, 734776, 1061672, 1533938, 2216216 ]
[ "nonn" ]
A082362
[ 0, 1, 3, 4, 2, 8, 9, 11, 12, 13, 5, 6, 7, 10, 22, 23, 25, 26, 27, 31, 32, 34, 35, 36, 38, 39, 40, 41, 14, 15, 16, 17, 18, 19, 20, 21, 24, 28, 29, 30, 33, 37, 64, 65, 67, 68, 69, 73, 74, 76, 77, 78, 80, 81, 82...
[ "nonn" ]
A015454
[ 1, 1, 9, 73, 593, 4817, 39129, 317849, 2581921, 20973217, 170367657, 1383914473, 11241683441, 91317382001, 741780739449, 6025563297593, 48946287120193, 397595860259137, 3229713169193289, 26235301213805450, 213112122879636900 ]
[ "nonn", "easy" ]
A003794
[ 1, 60, 20160, 987033600, 258492255436800, 361310134959341600000, 7.273689834748591e+28, 7.809945818238958e+37, 4.472444521962134e+47 ]
[ "nonn", "easy" ]
A005916
[ 1, 0, 1, 0, 2, 1, 3, 2, 5, 4, 7, 7, 11, 11, 15, 16, 21, 22, 28, 30, 37, 39, 47, 50, 60, 63, 74, 78, 91, 95, 109, 115, 131, 137, 154, 162, 181, 190, 210, 221, 243, 255, 278, 292, 318, 333, 360, 377, 407, 425, 457, 4...
[ "nonn" ]
A138418
[ 6, 36, 300, 1176, 7260, 14196, 41616, 64980, 139656, 353220, 461280, 936396, 1412040, 1708476, 2438736, 3943836, 6056940, 6921060, 10073316, 12703320, 14196456, 19471920, 23725716, 31367160, 44259936, 52025100, 56270136 ]
[ "nonn", "easy" ]
A112893
[ 2, 22, 222, 22212, 222220, 222222, 21222222, 222222224, 222222222, 22222222220, 222222222222, 2222222222220, 22222122222222, 222122222222222, 2222222222222220, 22222222222222224, 222202222222222200 ]
[ "base", "nonn" ]
A327237
[ 1, 1, 0, 1, 0, 1, 1, 3, 3, 1, 4, 40, 15, 4, 1, 56, 660, 267, 35, 5, 1, 1031, 18756, 11022, 1862, 90, 6, 1 ]
[ "nonn", "tabl", "more" ]
A239327
[ 1, 1, 1, 1, 2, 3, 2, 5, 5, 7, 10, 14, 14, 25, 26, 42, 48, 75, 79, 132, 142, 226, 252, 399, 432, 704, 760, 1223, 1336, 2143, 2328, 3759, 4079, 6564, 7150, 11495, 12496, 20135, 21874, 35215, 38310, 61639, 67018, 107912, 117298, ...
[ "nonn" ]
A119893
[ 67, 89, 139, 157, 179, 193, 197, 199, 229, 269, 283, 337, 359, 373, 379, 409, 449, 463, 467, 487, 557, 571, 577, 593, 607, 643, 647, 661, 683, 719, 733, 739, 751, 757, 773, 809, 823, 827, 829, 863, 881, 883, 919, 937, 953, 971...
[ "base", "nonn" ]
A237489
[ 256, 1728, 11960, 84000, 589944, 4135648, 28986208, 203229696, 1425235712, 9994034688, 70063673600, 491213816320, 3444698036992, 24155061404672, 169341502948352, 1187245857484800, 8325697972232192, 58381830568157180 ]
[ "nonn" ]
A019209
[ 0, 0, 3, 4, 6, 25, 48, 82, 234, 677, 1361, 3385, 9355, 22889, 56816, 151208, 391907, 1012586, 2658813, 7012558, 18453474, 48810225, 129638661, 344774554, 918443384, 2454132040, 6570320301, 17618843114, 47338336044 ]
[ "nonn", "more" ]
A001614
[ 1, 2, 4, 5, 7, 9, 10, 12, 14, 16, 17, 19, 21, 23, 25, 26, 28, 30, 32, 34, 36, 37, 39, 41, 43, 45, 47, 49, 50, 52, 54, 56, 58, 60, 62, 64, 65, 67, 69, 71, 73, 75, 77, 79, 81, 82, 84, 86, 88, 90, 92, 94, 96, 98, ...
[ "nonn", "easy", "nice", "tabl" ]
A093724
[ 109, 1, 34, 2, 6, 11, 5, 26, 35, 17, 13, 33, 75, 21, 55, 24, 68, 45, 79, 148, 202, 236, 261, 230, 193, 330, 481, 524, 771, 227, 618, 1042, 327, 1051, 1128, 687, 966, 632, 1624, 2646, 3739, 2392, 841, 752, 2677, 2785, 3819, ...
[ "nonn" ]
A339906
[ 1, 2, 4, 5, 8, 9, 10, 14, 16, 18, 32, 64, 65, 72, 84, 128, 129, 132, 136, 141, 145, 170, 256, 258, 261, 385, 448, 512, 516, 578, 642, 912, 1024, 1040, 1049, 1160, 1352, 2048, 4096, 4097, 4100, 4111, 4160, 4652, 4675, 4864, 5...
[ "nonn" ]
A077675
[ 11, 14, 19, 41, 89, 91, 94, 111, 114, 118, 119, 141, 149, 181, 191, 194, 199, 411, 418, 419, 449, 481, 489, 491, 494, 498, 499, 811, 814, 818, 849, 881, 889, 894, 898, 899, 911, 914, 919, 941, 949, 989, 991, 994, 998, 1111, ...
[ "base", "nonn" ]
A374935
[ 25, 36, 49, 64, 81, 100, 121, 134, 153, 172, 193, 212, 233, 252 ]
[ "nonn", "more" ]
A118349
[ 1, 1, 0, 1, 1, 0, 1, 2, 5, 0, 1, 3, 11, 30, 0, 1, 4, 18, 70, 201, 0, 1, 5, 26, 121, 487, 1445, 0, 1, 6, 35, 184, 873, 3592, 10900, 0, 1, 7, 45, 260, 1375, 6606, 27600, 85128, 0, 1, 8, 56, 350, 2010, 10672, 51728, ...
[ "nonn", "tabl" ]
A068737
[ 1, 25, 146797, 274074872265, 156588834507399530000 ]
[ "nonn", "more" ]
A214627
[ 2, 3, 7, 19, 29, 43, 47, 71, 83, 101, 113, 193, 197, 229, 241, 271, 283, 293, 311, 347, 383, 439, 457, 463, 491, 499, 523, 587, 619, 643, 683, 733, 797, 827, 857, 863, 919, 991, 1021, 1031, 1091, 1151, 1187, 1289, 1367, 1549, ...
[ "nonn" ]
A021823
[ 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2, 2, 1, 0, 0, 1, 2...
[ "nonn", "cons", "easy" ]
A240745
[ 1, 1, 3, 7, 16, 35, 76, 162, 342, 715, 1484, 3049, 6266, 12788, 26017, 52773, 106791, 215654, 434766, 875271, 1760058, 3535850, 7097682, 14238236, 28546852, 57209494, 114608933, 229529157, 459567874, 919969090, 1841299703, 3684822059, 7373269689, 147...
[ "nonn" ]