#include<iostream>
using namespace std;
long long n;
long long jc2( long long a) {
	if (a <= 1) {
		return 1;
	}
	return jc2(a - 2) * a;
}
int main() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		long long m;
		cin >> m;
		m--;
		cout << 2 * jc2(m) << endl;
	}
	return 0;
}