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A089872
Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071665/A071666.
0
1, 1, 2, 3, 6, 16, 40, 93, 226, 540, 1336, 3284, 8068, 19664, 47880, 116407, 282866, 687666, 1673920, 4077020, 9929636
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: A159343 A159341 A159342 * A006402 A284417 A219024
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 29 2003
STATUS
approved