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 A069742 #5 Nov 10 2007 03:00:00 %S A069742 1,1,1,169,57122,1130708969104,60520841316555286464512 %N A069742 Duplicate of A069743. %K A069742 dead %O A069742 1,4