a(n) = Sum_{k = 0..n} 3^k*A085707(n,k).

A094408

a(n) = Sum_{k = 0..n} 3^k*A085707(n,k).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =37a(4) =631a(5) =17266a(6) =692785a(7) =38325925a(8) =2795925136a(9) =260056965205

External references