Number of cover relations summed over the rank-1 labeled posets on [n].

A369921

Number of cover relations summed over the rank-1 labeled posets on [n].

Terms

    a(0) =0a(1) =0a(2) =2a(3) =18a(4) =204a(5) =2940a(6) =56670a(7) =1471806a(8) =52067512a(9) =2520298584a(10) =167850357210

External references