a(n) = 2^(2*n)*(n!)^2*Product_{e_k} binomial(2*e_k, e_k) where 2n = Product p_k^e_k is the prime factorization of 2n.
A151932
a(n) = 2^(2*n)*(n!)^2*Product_{e_k} binomial(2*e_k, e_k) where 2n = Product p_k^e_k is the prime factorization of 2n.
Terms
- a(0) =8a(1) =384a(2) =9216a(3) =2949120a(4) =58982400a(5) =25480396800
External references
- oeis: A151932