Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n loops and edges.
A099693
Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n loops and edges.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =89a(4) =1063a(5) =17099a(6) =352700a(7) =8987170a(8) =275303298a(9) =9930027149a(10) =414883314611
External references
- oeis: A099693