#include<iostream>
using namespace std;
int main(){
	int n,s,i;
	s=0;
	i=0;
	cin>>n;
	while(n>=1&&n<=200){
		
	s=n*n;
	i=i+s;
	n=n-1;
	}

	cout<<i<<endl;
}
		
/**************************************************************
	Problem: 1054
	User: admin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/