#include <bits/stdc++.h>
using namespace std;
unsigned long long sum=1,cnt=1;
int main(){
    unsigned long long n;
    cin>>n;
    for(int i=1;i<=n;i++){
        unsigned long long m;
        cin>>m;
        if(m==0){
        cout<<2<<endl;
        continue;
        }
        sum=1,cnt=1;
        for(int j=m-1;j>=1;j-=2){
            sum*=j;
        }
        cout<<2*sum<<endl;
    }
    return 0;
}