A098633 Consider the family of multigraphs enriched by the species of even sets. Sequence gives number of those multigraphs with 2n loops and edges.

1, 2, 23, 752, 51788, 6322577, 1226582843, 351300803492, 140872938680588

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..8.

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

Crossrefs

Sequence in context: A136039 A237580 A273976 * A015211 A378113 A266992

Adjacent sequences: A098630 A098631 A098632 * A098634 A098635 A098636

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved