#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main(){
  ll t;
  cin >> t;
  for (int i = 0; i < t; i++){
    ll n;
    cin >> n;
    if (n & 1){
      cout << 0 << endl;
    }
    else{
      cout << n * (n - 2) / 2 << endl;;
    }
  }
}