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 A077134 #5 May 11 2007 03:00:00 %S A077134 1,1,1,3,12,60,360,2520,20160,181440,1814400,19958400,239500800 %N A077134 Duplicate of A001710. %K A077134 dead %O A077134 0,4