#include <iostream>
#include <fstream>

using namespace std;

int div_comun(int N, int M)
{
    int div = 2;
    bool ok = false;
    while ((div <= N || div <= M) && ok == false)
    {
        if(N % div == 0 && M % div == 0)
        {
            ok = true;
        }
        ++div;
    }
    return ok;
    
}

int main()
{
    ifstream in("fractii.in");
    int N;
    in>>N;
    int nr = 0;
    for (unsigned int i = 1; i <= N; i++)
    {
        for (unsigned int j = 1; j <= N; j++)
        {
            if(!div_comun(i,j))
                ++nr;
        }
        
    }

    cout<<nr;
    return 0;
}