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A220825
Number of rooted gene trees with n leaves on the label set [5].
2
5, 15, 110, 965, 9376, 97775, 1068450, 12081605, 140160650, 1658936806, 19953117520, 243173225615, 2996409047690, 37268293795255, 467259511562294, 5899263870621530, 74934997567372640, 956996551484947905, 12280538887616448930, 158266409616840974927
OFFSET
1,1
LINKS
V. P. Johnson, Enumeration Results on Leaf Labeled Trees, Ph. D. Dissertation, Univ. Southern Calif., 2012.
CROSSREFS
Column 5 of A319254.
Sequence in context: A077702 A088418 A080490 * A303230 A173736 A244298
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 22 2012
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Sep 17 2018
STATUS
approved