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A099683 Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n arcs. 0
1, 1, 61, 19545, 19204813, 43724593641, 195751661906589 (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..6.

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

CROSSREFS

Sequence in context: A197105 A195216 A259412 * A337726 A057998 A182384

Adjacent sequences:  A099680 A099681 A099682 * A099684 A099685 A099686

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified October 1 13:38 EDT 2022. Contains 357149 sequences. (Running on oeis4.)