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 A218949 #10 Apr 15 2013 06:48:16 %S A218949 1,1,1,1,2,3,4,5,6,8,10,14,20,24 %N A218949 Number of maximal cyclic conjugacy classes of subgroups of the alternating group. %H A218949 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 A218949 Liam Naughton, <a href="http://www.maths.nuigalway.ie/~liam/CountingSubgroups.g">CountingSubgroups.g</a> %H A218949 Liam Naughton and Goetz Pfeiffer, <a href="http://schmidt.nuigalway.ie/tomlib/">Tomlib, The GAP table of marks library</a> %K A218949 nonn,more %O A218949 0,5 %A A218949 _Liam Naughton_, Nov 23 2012