Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled loops and arcs.
A099694
Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled loops and arcs.
Terms
- a(0) =1a(1) =2a(2) =17a(3) =244a(4) =5283a(5) =156092a(6) =5954547a(7) =282221828a(8) =16159327961
External references
- oeis: A099694