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A089418
Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A082333/A082334.
0
1, 1, 0, 1, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
OFFSET
0,5
COMMENTS
The number of n-node binary trees fixed by the corresponding automorphism(s).
CROSSREFS
Sequence in context: A115527 A050920 A001231 * A274981 A124856 A061858
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 29 2003
STATUS
approved