Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n loops and edges.
A099717
Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n loops and edges.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =70a(4) =798a(5) =12230a(6) =238979a(7) =5746740a(8) =165778237a(9) =5626476014a(10) =221330040771
External references
- oeis: A099717