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 A096263 #2 May 11 2007 03:00:00 %S A096263 2,3,7,13,43,73,139,181,547,607,1033,1171,1459,1861,1987,2029,2287 %N A096263 Duplicate of A007996. %K A096263 dead %O A096263 1,1