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 A112362 #3 Mar 30 2012 16:50:20 %S A112362 1,2,2,4,12,16,20,60,148,324,664,1600,4956,12796,27960,71596,255348, %T A112362 725648,1748672 %N A112362 A006967(n)/2. %K A112362 nonn %O A112362 2,2 %A A112362 _N. J. A. Sloane_, Dec 02 2005