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 A088664 #3 May 11 2007 03:00:00 %S A088664 5,7,11,13,19,29,37,41,47,53,61,79,83,97,103,107,113,127,131,137,139, %T A088664 149 %N A088664 Duplicate of A023219. %K A088664 dead %O A088664 1,1