Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled edges.
A099692
Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled edges.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =23a(4) =220a(5) =3016a(6) =55011a(7) =1265824a(8) =35496711a(9) =1183686987a(10) =46072834777
External references
- oeis: A099692