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A355911
Number of alt-unary-binary trees with n nodes.
2
1, 1, 2, 2, 2, 4, 4, 4, 4, 6, 8, 8, 8, 8, 8, 12, 12, 14, 16, 16, 16, 16, 16, 16, 24, 24, 24, 26, 28, 28, 32, 32, 32, 32, 32, 32, 32, 40
OFFSET
1,3
LINKS
Don Knuth, Ambidextrous Numbers, Preprint, September 2022. See (13.4).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 19 2022
STATUS
approved