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 A137162 #3 Aug 24 2012 10:50:00 %S A137162 3,5,13,15,21,27,31,33,37,45,49,57,61,69,79,81,85,87,93,99,103,105, %T A137162 109,115 %N A137162 Position of zeros in A137161. %Y A137162 Cf. A137161, A137163. %K A137162 easy,nonn %O A137162 0,1 %A A137162 _Paolo P. Lava_ and _Giorgio Balzarotti_, Jan 25 2008