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 A092187 #3 Mar 30 2012 16:49:52 %S A092187 1,1,4,6,36,72,576,1440,14400,43200,518400,1814400,25401600,101606400, %T A092187 1625702400,7315660800,131681894400,658409472000,13168189440000, %U A092187 72425041920000,1593350922240000,9560105533440000,229442532802560000,1491376463216640000,38775788043632640000 %N A092187 A092186(n)/2. %K A092187 nonn %O A092187 2,3 %A A092187 _N. J. A. Sloane_, Apr 02 2004