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A099717 Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n loops and edges. 2
1, 2, 9, 70, 798, 12230, 238979, 5746740, 165778237, 5626476014, 221330040771, 9950747684006 (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: A108522 A014500 A101482 * A322772 A177450 A193469

Adjacent sequences:  A099714 A099715 A099716 * A099718 A099719 A099720

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified December 3 15:43 EST 2021. Contains 349463 sequences. (Running on oeis4.)