#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    int i, j, n, k=0, d, a;
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f >> n;
    for (i=1; i<=n; i++)
    {
        for (j=1; j<=n; j++)
        {
            for (a=1; a<=min(i,j); a++) if (i%a==0&&j%a==0) d=a;
            if (d==1) k++;
        }
    }
    g << k;
    f.close();
    g.close();
    return 0;
}