#include <iostream>
#include <fstream>
using namespace std;

int cmmdc(int a, int b)
{
	if( a== 0 || b== 0 )
			return a;
		else
	while(a != b)
		{
			if( a>b )
				a= a- b;
			else
				b= b -a;
		}
		if ( a == 1 )
			return 0;
		else
			return a;
}
int main()
{
	int i,j,n,nr;
	nr=0;
	ifstream f;
	ofstream g;

	f.open("fractii.in");
	g.open("fratii.out");
	f>>n;
	for(i = 1 ; i<=n;i++)
		for(j=1; j<=n ; j++)
			if(cmmdc(i,j)==0)
				nr++;
	g<<nr;
	return 0;
}