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A089877
Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A071667/A071668.
1
1, 1, 0, 0, 0, 5, 0, 0, 0, 5, 0, 10, 0, 5, 0, 10, 0, 45, 0, 10, 0
OFFSET
0,6
COMMENTS
The number of n-node binary trees fixed by the corresponding automorphism(s).
CROSSREFS
Sequence in context: A243829 A329639 A318952 * A278715 A333947 A368662
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 29 2003
STATUS
approved