#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>

using namespace std;

void euclid(int a, int b, int *d)
{
    if (!b) {
        *d = a;
    } else {
        euclid(b, a % b, d);
    }
}

int main()
{
    ifstream in("fractii.in");
    ofstream out("fractii.out");
    
    int n;
    in >> n;
    
    int nf = 0;
    for (int a = 1; a <= n; a++) {
        for (int b = 1; b <= n; b++) {
            int d;
            euclid(a, b, &d);
            if (d == 1) {
               nf++; 
            }
        }
    }
    
    out << nf << "\n";
    
    in.close();
    out.close();
    return 0;
}