#include <fstream>
#include <math.h>

using namespace std;

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

int prim(int a, int b)
{
    int c;

    while(b)
    {
        c = a % b;
        a = b;
        b = c;
    }
    if(a == 1)
        return 1;
    return 0;
}

int fractii(int n)
{
    int i, j, nr = 0;

    for(i = 1; i < n + 1; i++)
        for(j = 1; j < n + 1; j++)
            if(prim(i, j))
                nr++;
    return nr;
}

int main()
{
    int n;

    f >> n;

    g << fractii(n);

    return 0;
}