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 A036237 #6 Feb 27 2009 03:00:00 %S A036237 1,2,5,4,7,10,15,8,11,14,13,28,21,78,17,16,19,22,49,42,23,26,1577,40 %N A036237 Duplicate of A015948. %K A036237 dead %O A036237 0,2