Consider the family of multigraphs enriched by the species of arborescences. Sequence gives number of those multigraphs with n arcs.
A099715
Consider the family of multigraphs enriched by the species of arborescences. Sequence gives number of those multigraphs with n arcs.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =113a(4) =2374a(5) =67927a(6) =2508632a(7) =115219211a(8) =6402538044a(9) =42137859873
External references
- oeis: A099715