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A220823
Number of rooted gene trees with n leaves on the label set [3].
3
3, 6, 28, 156, 948, 6206, 42504, 301548, 2195100, 16307598, 123128940, 942125110, 7289062320, 56926578912, 448186662992, 3553364598786, 28345260090444, 227337020914322, 1832102040838776, 14828608892376288, 120485979704314764, 982422914174633154, 8036158136627878572
OFFSET
1,1
LINKS
V. P. Johnson, Enumeration Results on Leaf Labeled Trees, Ph. D. Dissertation, Univ. Southern Calif., 2012.
CROSSREFS
Column 3 of A319254.
Sequence in context: A068808 A068133 A370668 * A024497 A007228 A326074
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 22 2012
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Sep 17 2018
STATUS
approved