#include <bits/stdc++.h>
using namespace std;

bool isRel(int number) {
	if (number % 7 == 0)	return true;
	while (number != 0) {
		int x = number % 10;
		if (x == 7)		return true;
		number /= 10;
	}
	
	return false;
}

int main() {
	int number = 0;
	while (cin >> number) {
		long ans = 0;
		for (int i = 1; i <= number; ++i) {
			if (!isRel(i)) {
				ans += pow(i, 2);
			}
		}
		
		cout << ans << endl;
	}
}