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 A010787 #5 Jan 24 2006 03:00:00 %S A010787 1,1,2,6,25,135,913,7499,73191,833597,10917343,162402263 %N A010787 Duplicate of A008933. %K A010787 dead %O A010787 1,3