#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
#define ull unsigned long long
const int N = 1e3 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	int n;
	cin >> n;
	int ans = 0;
	int sum = 0;
	int num = 0;
	for(int i = 1 ; i <= n ; i++)
	{
		sum = i / 10;
		num = i % 10;
		if(i % 7 == 0 || num == 7 || sum == 7)
			continue;
		else
			ans += i * i;
	}
	cout << ans << endl;
	return 0;
}