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A280769
Coefficients of g.f. for the class of multiply-rooted B-trees.
0
1, 2, 6, 33, 211, 1566, 12174, 98771
OFFSET
1,2
CROSSREFS
Sequence in context: A243324 A018952 A019028 * A127114 A138909 A138983
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 17 2017
STATUS
approved