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 A058107 #6 Mar 30 2012 17:37:11 %S A058107 1,1,3,12,78,746,10965,746277 %N A058107 Number of asymmetric semigroups of order n, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator). %H A058107 <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a> %Y A058107 Cf. A001423. %K A058107 nonn,hard %O A058107 0,3 %A A058107 _Christian G. Bower_, Nov 09 2000 %E A058107 Updated Feb 19 2001