#include <fstream>
#include <vector>
#include <set>
using namespace std;
int N, numar_fractii;

int IsValid (int x, int y)
{
	if (!y) return x;
	return IsValid (y, x%y);
}

int main ()
{
	ifstream in ("fractii.in");
	in >> N;
	in.close();
	
	for (int iii = 1; iii <= N; iii++)
	{
		for (int jjj = 1; jjj <= N; jjj++)
		{
			int gcd = IsValid(iii, jjj);
			if (gcd == 1)
				numar_fractii++;
		}
	}
	
	ofstream out ("fractii.out");
	out << numar_fractii;
	out.close();
	
	return 0;
}