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 A102599 #3 May 10 2013 12:45:40 %S A102599 1,1,2,16,284,12717,1468870 %N A102599 Number of n-node unlabeled connected oriented graphs whose underlying graphs are mating graphs, cf. A006024. %K A102599 more,nonn %O A102599 1,3 %A A102599 Goran Kilibarda, Zoran Maksimovic, _Vladeta Jovovic_, Jan 22 2005