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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.

CROSSREFS

Sequence in context: A243324 A018952 A019028 * A127114 A138909 A138983

Adjacent sequences:  A280766 A280767 A280768 * A280770 A280771 A280772

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 17 2017

STATUS

approved

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Last modified July 5 05:47 EDT 2022. Contains 355087 sequences. (Running on oeis4.)