uva 12149

#include<stdio.h>
int main()
{
    int n,i,sum;
    while(scanf("%d",&n)==1)
    {
        if(n==0)
            break;
            sum=0;
        for(i=1;i<=n;i++)
        {
            sum=sum+i*i;
            sum=sum;
        }
        printf("%d\n",sum);
    }
    return 0;
}