/* -*- coding: utf-8 -*-
 *
 * 2469.cc:  No.2469 Umbrella Queries - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d", &n);

    ll x = (n & 1) ? 0 : (ll)(n / 2 - 1) * n;
    printf("%lld\n", x);
  }

  return 0;
}