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 A096159 #3 Mar 30 2012 18:50:44 %S A096159 0,0,0,1,0,1,0,1,0,1,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,2,0,0,0,1, %T A096159 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0, %U A096159 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A096159 A096158(n) / 2. %K A096159 nonn %O A096159 1,12 %A A096159 _Reinhard Zumkeller_, Jun 18 2004