A126291 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A125985/A125986.

1, 1, 1, 2, 2, 5, 8, 11, 16, 23, 22, 32, 44, 54

Offset: 0

Author

Antti Karttunen, Jan 02 2007

Keywords

• nonn

Comments

The number of orbits (equivalence classes) to which Vaille's automorphism partitions the set of A000108(n) Dyck paths of semilength n. Note the non-monotone drop from a(9) to a(10).

Crossrefs

A126294(2n) = 2*a(2n) for n>0.