#include <stdio.h>

int main () {
  int t = 0;
  
  int res = 0;
  
  res = scanf("%d", &t);
  
  while (t > 0) {
    long long n = 0LL;
    res = scanf("%lld", &n);
    printf("%lld\n", n*(n+1LL));
    t--;
  }
  
  return 0;
}