/* -*- coding: utf-8 -*-
 *
 * 2216.cc:  No.2216 Pa1indr0me - 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);

    // sigma_{i=1)^n {n*2+1-(i*2-1)} = 2*sigma_{i=1}^n{n+1-i}
    // = 2*(n(n+1)-n(n+1)/2)=n(n+1)

    printf("%lld\n", (ll)n * (n + 1));
  }

  return 0;
}