#include<iostream>
#include<fstream>
#include<math.h>

using namespace std;

bool nrPrimeIntreEle(int a, int b);

int main(){
	int count = 0;
	int n = 0;
	
	ifstream inFile;
	inFile.open("fractii.in.txt");
	ofstream outFile;
	outFile.open("fractii.out.txt");
	
	inFile >> n;
	for (int i = 1; i <= n; i++){
		for (int j = 1; j <= n; j++){
			if (nrPrimeIntreEle(i, j)){
				count++;
			}
		}
	}
	outFile << count << "\n";

	count = 0;
	outFile.close();
	inFile.close();
	return 0;
}

bool nrPrimeIntreEle(int a, int b){
	while (a != b){
		if (a > b){
			a = a - b;
		}
		else{
			b = b - a;
		}
	}
	if (a == 1){
		return true;
	}
	else{
		return false;
	}
}