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

A098629

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

Terms

    a(0) =1a(1) =4a(2) =36a(3) =528a(4) =11392a(5) =334624a(6) =12677824a(7) =596369664a(8) =33872839680

External references