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 A094355 #4 Sep 29 2006 03:00:00 %S A094355 3,5,8,3,14,40,1270,15874,251984126 %N A094355 Duplicate of A087334. %K A094355 dead %O A094355 1,1