#include <cmath>
#include <algorithm>
#include <fstream>

using namespace std;

int main()
{
    int p, q, n;
    ifstream in("fractii.in");
    ofstream out("fractii.out");

    in>>n;

    int count;

    for(p = 1; p <= n; p++) {
        for(q = 1; q <= n; q++)
            if(__gcd(p, q) == 1) count++;
    }

    out<<count;

    return 0;
}