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 A177818 #7 Jun 06 2021 09:03:14 %S A177818 1,19,397841,1152331,3566699,24128658809,74683110361,216316727651, %T A177818 1339092172657,7967201553697 %N A177818 Numbers k such that k^3 divides 18^(k^2) + 1. %C A177818 19 divides a(n) for n > 1. %Y A177818 Cf. A127263 (k^3 divides 2^(k^2) + 1). %Y A177818 Cf. A128678, A128679, A128680, A128681, A128682, A128683, A128684, A128685. %Y A177818 Cf. A177813, A177814, A177816, A177817, A177818, A177819, A177820. %Y A177818 Cf. A128677 (least k > p such that (k*p)^3 divides (p-1)^(k*p)^2+1, where p = prime(n) > 2). %K A177818 more,nonn %O A177818 1,2 %A A177818 _Alexander Adamchuk_, May 14 2010 %E A177818 a(6)-a(10) from _Max Alekseyev_, May 16 2010