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 A126294 #2 Mar 31 2012 13:21:13 %S A126294 1,1,2,3,4,8,16,17,32,40,44,60,88,100 %N A126294 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A125987/A125988. %C A126294 The number of orbits (equivalence classes) to which the square of Vaille's automorphism partitions the set of A000108(n) Dyck paths of semilength n. %Y A126294 a(2n) = 2*A126291(2n) for n>0. %K A126294 nonn %O A126294 0,3 %A A126294 _Antti Karttunen_, Jan 02 2007