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 A112137 #2 Mar 31 2012 14:02:21 %S A112137 635,720,36,1680,60,769,311,25,155,924,1,1404,131,289,95,120,205,611, %T A112137 84,660,361,84,575,85,396,215,205,95,624,61,239,25,431,480,780,60,265, %U A112137 479,120,961,24,335,685,95,565,336,155,600,324,181,755,169,516,95 %N A112137 First differences of A112067. %Y A112137 Period=3240. Also half of the first differences of A112077. Cf. A112086. %K A112137 nonn %O A112137 1,1 %A A112137 _Antti Karttunen_, Aug 28 2005