#include<algorithm>
#include<iostream>
#include<vector>
#include<map>
#include<cassert>
#include<set>
#include<queue>
using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    int t ;
    cin>>t;
    while(t--){
        ll n;
        cin>>n;
        if(n%2==1){
            cout<<0<<endl;
        }else{
            ll a = n / 2;
            a = a * (n-2);
            cout<<a<<endl;
        }
    }
}