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URL: https://oeis.org/A120707

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A120707
Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A120705/A120706.
2
1, 1, 1, 2, 3, 6, 10, 20, 39, 72, 138, 286, 512
OFFSET
0,4
COMMENTS
The number of orbits to which the corresponding automorphisms partition the set of A000108(n) binary trees of n internal nodes.
CROSSREFS
Sequence in context: A005195 A228835 A052843 * A047111 A106741 A068991
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 28 2006
STATUS
approved