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

int euclid(int a, int b);

int main() {
    ifstream in("fractii.in");
    ofstream out("fractii.out");

    int n, nr = 0;
    in>>n;

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            nr += (euclid(i, j) == 1 ? 1 : 0);
        }
    }
    out<<nr;

    return 0;
}

int euclid(int a, int b){
    int c;
    while(b){
        c = a % b;
        a = b;
        b = c;
    }
    return a;
}