a(n) = (Pi/2)*(2*n+1)!*binomial(2*n+1, (2*n+1)/2).
A329928
a(n) = (Pi/2)*(2*n+1)!*binomial(2*n+1, (2*n+1)/2).
Terms
- a(0) =2a(1) =32a(2) =2048a(3) =294912a(4) =75497472a(5) =30198988800
External references
- oeis: A329928
A329928
a(n) = (Pi/2)*(2*n+1)!*binomial(2*n+1, (2*n+1)/2).