a(0) = 1, a(1) = 3, a(n) = 3*n*a(n-1) - 2*a(n-2).
A305472
a(0) = 1, a(1) = 3, a(n) = 3*n*a(n-1) - 2*a(n-2).
Terms
- a(0) =1a(1) =3a(2) =16a(3) =138a(4) =1624a(5) =24084a(6) =430264a(7) =8987376a(8) =214836496a(9) =5782610640a(10) =173048646208
External references
- oeis: A305472