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 A094349 #2 Mar 30 2012 17:28:13 %S A094349 1,4,8,9,10,17,18,21,35,36,37,43,71,72,73,76 %N A094349 Numbers n such that A094291(n) is odd. %Y A094349 Cf. A094291. %K A094349 nonn %O A094349 1,2 %A A094349 _Hugo van der Sanden_, Jun 15 2004