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 A127281 #2 Mar 31 2012 13:21:13 %S A127281 1,1,1,2,5,8,20,30,69,116,278,416,898 %N A127281 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A126315/A126316. %K A127281 nonn %O A127281 0,4 %A A127281 _Antti Karttunen_, Jan 16 2007