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 A093763 #2 Nov 10 2007 03:00:00 %S A093763 1,1,12,6,180,10,560,1260,12600,1260,166320,13860,2522520,2702700 %N A093763 Duplicate of A002548. %K A093763 dead %O A093763 1,3