#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: zhuangsongyu
	Language: C
	Result: Compile Error
****************************************************************/