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 A030243 #4 Mar 30 2012 17:37:00 %S A030243 0,0,4,34,580,23702 %N A030243 Number of nonisomorphic relations with a nontrivial symmetry. %Y A030243 Equals A000595-A030242. %K A030243 nonn,more %O A030243 0,3 %A A030243 _Christian G. Bower_