Consider the family of directed multigraphs enriched by the species of odd sets. Sequence gives number of those multigraphs with n labeled loops and arcs.
A098638
Consider the family of directed multigraphs enriched by the species of odd sets. Sequence gives number of those multigraphs with n labeled loops and arcs.
Terms
- a(0) =1a(1) =2a(2) =13a(3) =164a(4) =3127a(5) =82600a(6) =2845775a(7) =122820136a(8) =6446913953a(9) =402413160952
External references
- oeis: A098638