a(n) = 4*(2*n+1)(n*a(n-1) + (-1)^(n-1)*((n-1)!)^2), with a(0) = 0, n > 0.
A302945
a(n) = 4*(2*n+1)(n*a(n-1) + (-1)^(n-1)*((n-1)!)^2), with a(0) = 0, n > 0.
Terms
- a(0) =0a(1) =12a(2) =460a(3) =38752a(4) =5578992a(5) =1227403584a(6) =382949169408
External references
- oeis: A302945