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A089424
Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082351/A082352.
0
1, 1, 2, 3, 6, 18, 48, 151, 478, 1580, 5304, 18220, 63308, 222936, 792436, 2841807, 10265130, 37322728, 136468200, 501523066, 1851418668
OFFSET
0,3
COMMENTS
The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes.
CROSSREFS
Sequence in context: A277703 A080338 A057581 * A083563 A038056 A072241
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 29 2003
STATUS
approved