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A099693 Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n loops and edges. 3
1, 2, 11, 89, 1063, 17099, 352700, 8987170, 275303298, 9930027149, 414883314611 (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..10.

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

CROSSREFS

Sequence in context: A215623 A099662 A307770 * A197794 A197914 A138552

Adjacent sequences:  A099690 A099691 A099692 * A099694 A099695 A099696

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified October 21 05:28 EDT 2021. Contains 348141 sequences. (Running on oeis4.)