#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int u(int a,int b)
{
	int r;
	while(b)
	{ 
		r=a%b;
		a=b;
		b=r;
	}
	return a;
}
int main()
{
	int n,i,j,nr=0;
	f>>n;
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
			if(u(i,j)==1)
				nr++;
	g<<nr;
	return 0;
}