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A089846
Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868.
2
1, 1, 2, 5, 13, 35, 100, 296, 903, 2857, 9274, 30852, 104784, 362108, 1269324, 4502624, 16130539, 58271303, 212001890, 776027286, 2855731796
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: A107086 A294790 A234643 * A258450 A131868 A339294
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 20 2003
STATUS
approved