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 A075012 #2 Nov 10 2007 03:00:00 %S A075012 2,3,5,7,8,981,114462,13082645,1471900839,1635537203,1799173568 %N A075012 Duplicate of A067090. %K A075012 dead %O A075012 1,1