UVA_12149_Feynman

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <set>
#include <sstream>
#include <stdlib.h>
#include <cmath>
#define LL unsigned long long
using namespace std;

int main() {
    int n;
    while(scanf("%d",&n)){
        if(n==0) break;
        int result=(n*(n+1)*((2*n)+1))/6;
        printf("%d\n",result);
    };
    return 0;
}