Number of antichains of nonempty subsets of {1..n} that are either non-connected or non-covering (spanning edge-connectivity 0).
A327355
Number of 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) =4a(3) =14a(4) =83a(5) =1232a(6) =84625a(7) =109147467
External references
- oeis: A327355