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 A096350 #3 May 11 2007 03:00:00 %S A096350 2,3,7,31,211,2311,200560490131 %N A096350 Duplicate of A018239. %K A096350 dead %O A096350 1,1