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

0,4

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).

Links

Table of n, a(n) for n=0..13.

Crossrefs

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

Sequence in context: A183928 A333191 A329739 * A056224 A293674 A052527

Adjacent sequences: A126288 A126289 A126290 * A126292 A126293 A126294

Keyword

nonn

Author

Antti Karttunen, Jan 02 2007

Status

approved