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 A080784 #4 Jun 01 2010 03:00:00 %S A080784 1,6,10,14,22,26,34,36,38,46,58,60,62,74,82,84,86,94,100,106,118,122 %N A080784 Duplicate of A072978. %K A080784 dead %O A080784 1,2