117327450240domain: NAppears in sequencesA product of quotients of factorials.at n=20A161887a(n) = h(1)*h(2)*...*h(n), where h(i) = i/[g(i/2)*g(i/4)*g(i/8)*...] and g(x) = x if x is an integer and g(x) = 1 otherwise.at n=22A185021