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A280767 Coefficients of g.f. for the class of C-trees. 0
1, 1, 4, 16, 70, 322, 1556, 39698, 207217 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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: A180145 A133789 A151244 * A091354 A326654 A246014

Adjacent sequences:  A280764 A280765 A280766 * A280768 A280769 A280770

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 17 2017

STATUS

approved

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Last modified August 15 15:16 EDT 2022. Contains 356146 sequences. (Running on oeis4.)