A280768 Coefficients of g.f. for the class of multiply-rooted C-trees.

1, 2, 6, 23, 97, 446, 2140, 10662, 54482

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: A150297 A374165 A150298 * A370183 A278301 A242586

Adjacent sequences: A280765 A280766 A280767 * A280769 A280770 A280771

Keyword

nonn,more

Author

N. J. A. Sloane, Jan 17 2017

Status

approved