#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int div(int x, int y) {
for (int i=2; i<=x; i++) if (x%i == 0 && y%i == 0) return 0; return 1;
}
int main()
{
    int n, i, j, nr=0;
    f>>n;
    for (i=1; i<=n; i++) for (j=1; j<=n; j++) if (i%j != 0 && j%i !=0 && div(i, j)==1) nr++;
    g<<nr+n*2-1;
    return 0;
}