a(n) = C(A001359(n)), n >= 1, with C(n) = (4*((n-1)! + 1) + n)/(n*(n+2)) for n >= 2.
A292691
a(n) = C(A001359(n)), n >= 1, with C(n) = (4*((n-1)! + 1) + n)/(n*(n+2)) for n >= 2.
Terms
- a(0) =1a(1) =3a(2) =101505a(3) =259105757127
External references
- oeis: A292691