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 A094481 #3 Nov 10 2007 03:00:00 %S A094481 13,29,53,173,293,1373,2213,4493,5333,9413,10613,18773,26573,27893 %N A094481 Duplicate of A045637. %K A094481 dead %O A094481 1,1