#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream x("fractii.in");
    ofstream y("fractii.out");

    int n,p,q,nr;

    nr=0;
    x>>n;

    nr=0;

    p=1;
    for (p=1;p<=n;p++)
        for (q=1;q<=n;q++)
            if (((p%q!=0) || (q==1))&&((q%p!=0) || (p==1))) nr++;

    y<<nr;

    x.close();
    y.close();

    return 0;

}