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 A177918 #16 Jun 06 2021 06:02:01 %S A177918 1,17,343927,1414961,28626075991,610559655569,5417488064959 %N A177918 Numbers k such that k^3 divides 18^(k^2) - 1. %C A177918 17 divides a(n) for n > 1. %t A177918 Select[Range[350000], Mod[PowerMod[18, #^2, #^3] - 1, #^3] == 0 &] (* _Julien Kluge_, Sep 20 2016 *) %Y A177918 Cf. A128358 (k divides 18^k - 1), A128398 (k^2 divides 18^k - 1). %Y A177918 Cf. A129211, A129212, A177905, A127106, A177907, A127102, A177909, A177243. %Y A177918 Cf. A177911, A177912, A177913, A177914, A177915, A177916, A177917, A177918, A177919, A177920. %K A177918 hard,more,nonn %O A177918 1,2 %A A177918 _Alexander Adamchuk_, May 14 2010 %E A177918 Three more terms from _Max Alekseyev_, Oct 02 2010