This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A274562 #28 Jun 13 2025 22:33:03 %S A274562 5,6,7,9,10,11,12,14,17,38,92,168,170,248,752,988,2528,2808,8648, %T A274562 12008,34688,63248,117808,526688,531968,820808,1292768,1495688, %U A274562 2095208,2112512,3477608,4495808,8419328,12026888,13192768,16102808,26347688,29322008,33653888,169371008,173631608,293947648,537116672,883927808,2147975168,2493705728,5556840416,13092865928,42783299288,69662739968,80999455688,217898810368,546409576448,1020401174528,1081071376208,1282330216448,1473186024448,1577975316488,1608005456768 %N A274562 Numbers k such that sigma(k) == 0 (mod k-8). %e A274562 sigma(9) mod (9 - 8) = 13 mod 1 = 0. %t A274562 Select[Range[1, 10^6], # - 8 != 0 && Mod[DivisorSigma[1, #], # - 8] == 0 &] (* _Michael De Vlieger_, Jul 05 2016 *) %Y A274562 Cf. A000203, A045770, A067702, A088833, A181598, A274551, A274552, A274553, A274554, A274556, A274557, A274558, A274559, A274560, A274561, A274563, A274564, A274565, A274566. %K A274562 nonn %O A274562 1,1 %A A274562 _Paolo P. Lava_, Jul 05 2016 %E A274562 a(33)-a(59) from _Giovanni Resta_, Jul 05 2016 %E A274562 Terms 5,6,7 inserted by _Max Alekseyev_, Jun 04 2025