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 A118579 #3 Jun 29 2008 03:00:00 %S A118579 1,2,312,23760,45326160 %N A118579 Erroneous version of A015704. %K A118579 dead %O A118579 1,2