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 A209865 #8 Mar 30 2012 17:23:15 %S A209865 1,1,1,1,2,5,8,26,96,246,181,540,868,724,6038,4405,23302,39514,34480, %T A209865 83424,270884 %N A209865 a(n) = maximal cycle size in range [2^(n-1),(2^n)-1] of permutation A209861/A209862. %C A209865 a(0) gives the maximum cycle size in range [0,0], i.e. 1. %Y A209865 Cf. A209863, A209864, A209866, A209867. %K A209865 nonn %O A209865 0,5 %A A209865 _Antti Karttunen_, Mar 24 2012