#include <iostream>
#include <fstream>

using namespace std;
ifstream f("fractii.in");
ofstream l("fractii.out");
int ireductibil(int a,int b)
{
    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;
}