A099683 Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n arcs.

1, 1, 61, 19545, 19204813, 43724593641, 195751661906589

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