#include <iostream>
#include<fstream>
int cmmdc(int a, int b)
{
    int r;
    r=a%b;
    while(r)
    {
        a=b;
        b=r;
        r=a%b;
    }
    return b;
}

using namespace std;

int main()
{
	int n,contor=0,i,j;
	ifstream in("fractii.in");
	ofstream out ("fractii.out");
	in>>n;
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n;j++)
		{
			if (cmmdc(i,j)==1) contor++;
		}
	}
	out<<contor;
    return 0;
}