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 A218948 #10 Apr 15 2013 06:45:16 %S A218948 1,1,1,1,2,3,5,6,13,19,22,27,40,54 %N A218948 Number of maximal abelian conjugacy classes of subgroups of the alternating group. %H A218948 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 A218948 Liam Naughton, <a href="http://www.maths.nuigalway.ie/~liam/CountingSubgroups.g">CountingSubgroups.g</a> %H A218948 Liam Naughton and Goetz Pfeiffer, <a href="http://schmidt.nuigalway.ie/tomlib/">Tomlib, The GAP table of marks library</a> %K A218948 nonn,more %O A218948 0,5 %A A218948 _Liam Naughton_, Nov 23 2012