A099707 Consider the family of multigraphs enriched by the species of directed graphs. Sequence gives number of those multigraphs with n arcs.

1, 2, 40, 1632, 140128, 42396096, 71916221184, 569069398642688, 18501543711357418496, 2419851465592233142433792

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..9.

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

Crossrefs

Sequence in context: A341589 A286124 A275931 * A198248 A261732 A292418

Adjacent sequences: A099704 A099705 A099706 * A099708 A099709 A099710

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved