A098632 Consider the family of multigraphs enriched by the species of even sets. Sequence gives number of those multigraphs with 2n edges.

1, 1, 7, 166, 9367, 991186, 171380452, 44509993711, 16385216984962

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..8.

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

Crossrefs

Sequence in context: A020998 A012504 A012689 * A192275 A009807 A220991

Adjacent sequences: A098629 A098630 A098631 * A098633 A098634 A098635

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved