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 A218951 #10 Apr 15 2013 06:45:10 %S A218951 1,1,0,1,2,1,3,1,14,5,12,2,69,3 %N A218951 Number of conjugacy classes of connected abelian subgroups of the alternating group. %H A218951 Liam Naughton and Goetz Pfeiffer, <a href="http://arxiv.org/abs/1211.1911">Integer sequences realized by the subgroup pattern of the symmetric group</a>, arXiv:1211.1911 %H A218951 Liam Naughton, <a href="http://www.maths.nuigalway.ie/~liam/CountingSubgroups.g">CountingSubgroups.g</a> %H A218951 Liam Naughton and Goetz Pfeiffer, <a href="http://schmidt.nuigalway.ie/tomlib/">Tomlib, The GAP table of marks library</a> %K A218951 nonn,more %O A218951 0,5 %A A218951 _Liam Naughton_, Nov 23 2012