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A126291 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A125985/A125986. +0
3
1, 1, 1, 2, 2, 5, 8, 11, 16, 23, 22, 32, 44, 54 (list; graph; listen)
OFFSET

0,4

COMMENT

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.

Sequence in context: A077232 A087910 A035570 this_sequence A056224 A052527 A042982

Adjacent sequences: A126288 A126289 A126290 this_sequence A126292 A126293 A126294

KEYWORD

nonn

AUTHOR

Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Jan 02 2007

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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