A280769 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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