a(0) = 1, a(1) = 3, a(n) = 3*n*a(n-1) + a(n-2).
A305459
a(0) = 1, a(1) = 3, a(n) = 3*n*a(n-1) + a(n-2).
Terms
- a(0) =1a(1) =3a(2) =19a(3) =174a(4) =2107a(5) =31779a(6) =574129a(7) =12088488a(8) =290697841a(9) =7860930195a(10) =236118603691
External references
- oeis: A305459