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 A126777 #8 Mar 30 2012 18:40:42 %S A126777 1,2,12,152,2347,43763,890355,18085322,325165209 %N A126777 Size of unconstrained level set on Diamond(5) Diagonal Peg Solitaire at level n. %H A126777 George I. Bell, <a href="http://arxiv.org/abs/math/0606122v2">Diagonal Peg Solitaire</a>, arXiv:math/0606122v2 [math.CO], 25 Jan 2007, table 1, p. 14. %K A126777 nonn,hard %O A126777 0,2 %A A126777 _Jonathan Vos Post_, Feb 18 2007