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 A084607 #4 May 11 2007 03:00:00 %S A084607 1,2,8,32,136,592,2624,11776,53344,243392,1116928,5149696,23835904 %N A084607 Duplicate of A006139. %K A084607 dead %O A084607 0,2