Number of sets of subsets of {1..n} whose dual is a weak antichain.
A326969
Number of sets of subsets of {1..n} whose dual is a weak antichain.
Terms
- a(0) =2a(1) =4a(2) =12a(3) =112a(4) =38892a(5) =4021039096
External references
- oeis: A326969
A326969
Number of sets of subsets of {1..n} whose dual is a weak antichain.