A099682 Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n loops and arcs.

1, 2, 132, 46454, 48860748, 117834107302, 554073633956884

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..6.

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

Crossrefs

Sequence in context: A157071 A174585 A186194 * A214436 A135759 A014315

Adjacent sequences: A099679 A099680 A099681 * A099683 A099684 A099685

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved