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 A088273 #3 May 11 2007 03:00:00 %S A088273 1,2,5,6,11,17,18,39,56,101,105,107,123,413,426,2607 %N A088273 Duplicate of A049054. %K A088273 dead %O A088273 1,2