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 A072714 #5 Nov 10 2007 03:00:00 %S A072714 1,1,1,1,2,3,7,43,452,45351,125920291,60027819184831 %N A072714 Duplicate of A051786. %K A072714 dead %O A072714 1,5