Number of nonisomorphic n-element self-dual posets (or partially ordered sets).
A133983
Number of nonisomorphic n-element self-dual posets (or partially ordered sets).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =8a(4) =15a(5) =50a(6) =119a(7) =493a(8) =1521a(9) =7924a(10) =30783a(11) =209818
External references
- oeis: A133983