A099697 Consider the family of multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n loops and edges.

1, 2, 11, 93, 1135, 18567, 387976, 9991794, 308837454, 11225560583, 472141867849

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..10.

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

Crossrefs

Sequence in context: A164893 A355111 A363116 * A346185 A083069 A158837

Adjacent sequences: A099694 A099695 A099696 * A099698 A099699 A099700

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved