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 A058171 #6 Mar 30 2012 17:37:12 %S A058171 1,1,1,4,24,746,567207 %N A058171 Number of quasigroups of order n, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator). %H A058171 <a href="/index/Qua#quasigroups">Index entries for sequences related to quasigroups</a> %Y A058171 a(n)=(A057991(n)+A057993)/2. %K A058171 nonn,more %O A058171 0,4 %A A058171 _Christian G. Bower_, Nov 20 2000