A089876 - OEIS

%I #6 Mar 31 2012 14:02:17

%S 1,1,1,2,3,14,22,62,127,320,756,1888,4440,10996,26784,67004,166449,

%T 417848,1041262,2596506,6427116

%N Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071667/A071668.

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

%H A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a>

%K nonn

%O 0,4

%A _Antti Karttunen_, Nov 29 2003