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 A090662 #3 Nov 10 2007 03:00:00 %S A090662 2,3,2,5,3,7,2,3,5,11,2,13,7,5,2,17,3,19,5,7,11,23,2,5,13,3,7,29,5,31, %T A090662 2 %N A090662 Duplicate of A088387. %K A090662 dead %O A090662 2,1