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Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A071667/A071668.
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%I #5 Mar 31 2012 14:02:17

%S 1,1,0,0,0,5,0,0,0,5,0,10,0,5,0,10,0,45,0,10,0

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

%C The number of n-node binary trees fixed by the corresponding automorphism(s).

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

%K nonn

%O 0,6

%A _Antti Karttunen_, Nov 29 2003