Column 2 of triangle A113389, also equals column 0 of A113370^9.
A113391
Column 2 of triangle A113389, also equals column 0 of A113370^9.
Terms
- a(0) =1a(1) =9a(2) =153a(3) =3621a(4) =110637a(5) =4176549a(6) =188802141a(7) =9981491997a(8) =605817292893
External references
- oeis: A113391