Consider the family of multigraphs enriched by the species of endofunctions. Sequence gives number of those multigraphs with n loops and edges.
A099709
Consider the family of multigraphs enriched by the species of endofunctions. Sequence gives number of those multigraphs with n loops and edges.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =181a(4) =3039a(5) =66065a(6) =1779764a(7) =57667098a(8) =2198654278a(9) =96987734231
External references
- oeis: A099709