A089405 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A073288/A073289.

1, 1, 2, 4, 9, 20, 47, 112, 279, 712, 1868, 5020, 13792, 38630, 110105, 318756, 935817, 2782424, 8368484, 25434314, 78047606

Offset: 0

Author

Antti Karttunen, Nov 29 2003

Keywords

• nonn

Comments

The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes.

Links

• A. Karttunen, C-program for computing the initial terms of this sequence