#include <iostream>
#include <fstream>

using namespace std;
ifstream f("fractii.in");
ofstream l("fractii.out");
int ireductibil(int a,int b)
{
    if (a%b!=0 or b%a!=0)
    {
        while (a!=b)
        {
            if (a>b)
                a=a-b;
            if (b>a)
                b=b-a;
        }
    }
    if (a==1)
        return 1;
    else
        return 0;
}
int a,b,n,nr;

int main()
{
    f>>n;
    for (a=1; a<=n; a++)
    {
        for (b=1; b<=n; b++)
        {
            if (ireductibil(a,b)==1)
                nr++;
        }
    }
    l<<nr;
    return 0;
}