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 A080559 #2 Nov 10 2007 03:00:00 %S A080559 1,12,66,220,495,792,924,792,495,220,66,12,1 %N A080559 Duplicate of A010928. %K A080559 dead %O A080559 0,2