Number of unlabeled antichains of nonempty subsets of {1..n} that are either non-connected or non-covering (spanning edge-connectivity 0).
A327437
Number of unlabeled antichains of nonempty subsets of {1..n} that are either non-connected or non-covering (spanning edge-connectivity 0).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =15a(5) =52a(6) =410a(7) =32697
External references
- oeis: A327437