2857680000domain: NAppears in sequencesa(n) = Product_{j=0..floor(n/2)} binomial(n,j).at n=9A061778a(n) = n^1*(n+1)^2*(n+2)^3*(n+3)^4*(n+4)^5/(1!*2!*3!*4!*5!).at n=5A120408a(n) = Product_{k=0..n} binomial(2*n, k).at n=5A296589Product of primorials of consecutive integers (second definition A034386).at n=8A328946