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 A153222 #18 May 21 2014 20:51:24 %S A153222 2,5,11,17,29,31,37,61,67,71,89,101,109,127,137,167 %N A153222 Duplicate of A023222. %K A153222 dead %O A153222 1,1