a(n) = Sum_{k=0..n} C(n,k)^(k+1).

A184731

a(n) = Sum_{k=0..n} C(n,k)^(k+1).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =38a(4) =490a(5) =14152a(6) =969444a(7) =140621476a(8) =46041241698

External references