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A280768 Coefficients of g.f. for the class of multiply-rooted C-trees. 0
1, 2, 6, 23, 97, 446, 2140, 10662, 54482 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

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

CROSSREFS

Sequence in context: A111283 A150297 A150298 * A278301 A242586 A196018

Adjacent sequences:  A280765 A280766 A280767 * A280769 A280770 A280771

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 17 2017

STATUS

approved

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Last modified August 14 18:13 EDT 2022. Contains 356122 sequences. (Running on oeis4.)