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 A066243 #4 May 11 2007 03:00:00 %S A066243 2,2,2,4,2,6,4,6,5,10,3,12,7,6,8,16,9,18,4,12,11,22,6,20,13,18,12,28,5 %N A066243 Superseded by A063428. %K A066243 dead %O A066243 2,1