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 A082753 #3 May 11 2007 03:00:00 %S A082753 0,1,5,17,49,129,321,769,1793,4097,9217,20481,45057,98305,212993 %N A082753 Duplicate of A000337. %K A082753 dead %O A082753 1,3