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

A099704

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

Terms

    a(0) =1a(1) =2a(2) =24a(3) =776a(4) =79840a(5) =35397440a(6) =69619053504

External references