#include <fstream>
#include <iostream>
using namespace std;

ifstream f("fractii.in");
ofstream o("fractii.out");

main()
{
    int n,k=1;
    double m;
    f>>n;
    for (int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            if (i==j){continue;}
            m=(1.0*i/j);
            if (i==1 || j==1 ) {k++; continue;}
            if ((1.0*i)/j==(int)((1.0*i)/j)){continue;}
            if ((1.0*j)/i==(int)((1.0*j)/i)){continue;}
            k++;
        }
    }
    o<<k;
}