a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).

A336228

a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =75a(4) =1684a(5) =59005a(6) =2977566a(7) =204512875a(8) =18346977608

External references