C :

#include<stdio.h>
int main()
{
	int N,n;
	scanf("%d",&N);
	while(N--)
	{
		int i,j,item,s;
		item=s=0;
		scanf("%d",&n);
		for(i=1;i<=n;i++)
		{
			for(j=1;j<=i;j++)
				item+=j;
		}
		s+=item;
		printf("%d\n",s);
	}
	return 0;
}

C++ :

#include "cstdio"
int main()
{
	int t,n;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d",&n);
		printf("%d\n",(n*(n+1)*(2*n+1)/6+n*(n+1)/2)/2);
	}
	return 0;
}

Java :

import java.util.Scanner;
public class Main
{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		while(N-->0)
		{
			int x=sc.nextInt();
			System.out.println((int)((Math.pow(x,3)+3*Math.pow(x,2)+2*x)/6));
		}
	}
}