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 A051058 #3 Mar 30 2012 18:37:41 %S A051058 0,0,0,0,0,0,0,0,0,0,1,2,4,7,13,21,36,56,89,135,207,305,453,656,950, %T A051058 1351,1922,2694,3772,5224,7218,9885 %N A051058 Record subsequence of b(3k+2), b()=A048142(). %K A051058 nonn %O A051058 0,12 %A A051058 _Wouter Meeussen_