A099717 Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n loops and edges.

1, 2, 9, 70, 798, 12230, 238979, 5746740, 165778237, 5626476014, 221330040771, 9950747684006

Offset: 0

Author

N. J. A. Sloane, Oct 26 2004

Keywords

• nonn

References

• G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.

Links

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