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

%S 1,1,2,4,9,20,47,112,279,712,1868,5020,13792,38630,110105,318756,

%T 935817,2782424,8368484,25434314,78047606

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

%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 0,3

%A _Antti Karttunen_, Nov 29 2003