a(n) = a(n-1) * a(n-2) * (1 - 2 / (n * (n-1))), with a(1) = 2, a(2) = 3.
A380023
a(n) = a(n-1) * a(n-2) * (1 - 2 / (n * (n-1))), with a(1) = 2, a(2) = 3.
Terms
- a(0) =2a(1) =3a(2) =4a(3) =10a(4) =36a(5) =336a(6) =11520a(7) =3732480a(8) =41803776000
External references
- oeis: A380023