a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * (3*k-2) * a(n-k).

A337552

a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * (3*k-2) * a(n-k).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =37a(4) =330a(5) =3613a(6) =47652a(7) =732625a(8) =12875118a(9) =254540413a(10) =5591435136a(11) =135108218353

External references