A099705 Consider the family of multigraphs enriched by the species of directed graphs. Sequence gives number of those multigraphs with n loops and edges.

1, 4, 60, 2040, 188080, 74164384, 140677401088, 1132868741554944, 36957109369822385664, 4838033391155896811513344

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]