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A098343 Consider the family of multigraphs enriched by the species of binary arborescences. Sequence gives number of those multigraphs with n edges and loops. 0
1, 2, 15, 187, 3283, 74825, 2109272, 71217488, 2815154006, 128079232835, 6618682431711, 384397221347345 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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: A319834 A268420 A208402 * A052819 A127090 A198522

Adjacent sequences:  A098340 A098341 A098342 * A098344 A098345 A098346

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified September 21 00:17 EDT 2019. Contains 327252 sequences. (Running on oeis4.)