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 A088497 #4 May 11 2007 03:00:00 %S A088497 2,3,5,6,8,15,20,21,24,38,41,50,54,59,66,89,101,131,138,141,153,155, %T A088497 164 %N A088497 Duplicate of A088485. %K A088497 dead %O A088497 1,1