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 A317253 #15 Aug 13 2018 13:38:35 %S A317253 4,8,9,11,16,17,20,22,23,27,32,33,36,40,41,43,46,47,52,54,55,59,64,65, %T A317253 68,72,73,75,80,81,84,86,87,91,94,95,100,104,105,107,110,111,116,118, %U A317253 119,123,128,129,132,136,137,139,144,145,148,150,151,155,160,161 %N A317253 Indices m for which A317414(m) = 1. %C A317253 This is a supporting sequence for A317627. %Y A317253 Cf. A317414, A317627. %K A317253 nonn %O A317253 1,1 %A A317253 _A.H.M. Smeets_, Aug 13 2018