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A098342 Consider the family of multigraphs enriched by the species of binary arborescences. Sequence gives number of those multigraphs with n edges. 0
1, 1, 6, 63, 958, 19254, 484735, 14759358, 530271461, 22073719357, 1049789517047, 56406216212727 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.

LINKS

Table of n, a(n) for n=0..11.

G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]

CROSSREFS

Sequence in context: A121415 A227278 A295267 * A107995 A166893 A213644

Adjacent sequences:  A098339 A098340 A098341 * A098343 A098344 A098345

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified September 15 16:12 EDT 2019. Contains 327078 sequences. (Running on oeis4.)