/* Solution to HackerRank: Sum Square Difference
 * URL: https://www.hackerrank.com/contests/projecteuler/challenges/euler006
 */
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        for(int a0 = 0; a0 < t; a0++){
            int n = in.nextInt();
            
            long squareSum = 0;
            long sum = 0;
            
            for(int i = 1; i <= n; i++){
                squareSum+=(i*i);
                sum+=i;
            }
            
            System.out.println(Math.abs(sum*sum-squareSum));
        }
    }
}