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Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082339/A082340.
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%I #6 Mar 31 2012 14:02:17

%S 1,1,2,4,10,26,74,218,672,2134,6964,23206,78724,271014,944766,3328872,

%T 11838378,42441326,153236900,556746772,2034098988

%N Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082339/A082340.

%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