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 A093004 #1 Jun 12 2004 03:00:00 %S A093004 100,500,1,50,5 %N A093004 Erroneous version of A003588. %K A093004 dead %O A093004 1,1