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 A093904 #4 May 11 2007 03:00:00 %S A093904 0,1,4,17,84,485,3236,24609,210572,2004749,21033900,241237001 %N A093904 Duplicate of A093344. %K A093904 dead %O A093904 1,3