A099680 Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n edges.

1, 1, 21, 2689, 1162525, 1213162861, 2531581232565

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: A225686 A221779 A122801 * A352086 A184367 A114934

Adjacent sequences: A099677 A099678 A099679 * A099681 A099682 A099683

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved