Number of partially ordered sets ("posets") with n labeled elements (or labeled acyclic transitive digraphs).

A001035

Number of partially ordered sets ("posets") with n labeled elements (or labeled acyclic transitive digraphs).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =19a(4) =219a(5) =4231a(6) =130023a(7) =6129859a(8) =431723379a(9) =44511042511

External references