#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,ans=0,a;
    cin>>n;
    while(n>=1&&n<=200) {
        a=n*n;
        ans+=a;
        n-=1;
    }
    cout<<ans;
}
/**************************************************************
	Problem: 1054
	User: wangchenyu
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/