A089872 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071665/A071666.

1, 1, 2, 3, 6, 16, 40, 93, 226, 540, 1336, 3284, 8068, 19664, 47880, 116407, 282866, 687666, 1673920, 4077020, 9929636

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