Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled arcs.
A099695
Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled arcs.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =106a(4) =2144a(5) =59844a(6) =2173450a(7) =98648246a(8) =5433864078a(9) =355229741266
External references
- oeis: A099695