#include<iostream>
#include<fstream>

using namespace std;

bool nrPrimeIntreEle(int a, int b){
	int r;

	do{
		r = a%b;
		a = b;
		b = r;
	} while (r != 0);

	if (a == 1)
		return true;
	return false;
}

int main(){
	int count = 0;
	int n = 0;
	
	ifstream inFile;
	inFile.open("fractii.in.txt");
	ofstream outFile;
	outFile.open("fractii.out.txt");
	
	while (!inFile.eof()){
		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;
}