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 A054319 #4 May 11 2007 03:00:00 %S A054319 1,121,11881,1164241,114083761,11179044361,1095432263641 %N A054319 Duplicate of A006061. %K A054319 dead %O A054319 1,2