#include <fstream>
using namespace std;

int checkf(int a, int b) {

    while(a != b) {
        if(a > b)
            a -= b;
        else
            b -= a;
    }

    return a == 1;
}

int main () {

    int n,
        ct = 0;

    ifstream read("fractii.in");
    ofstream write("fractii.out");

    read >> n;

    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= n; j++)
            if(checkf(i,j))
                ct++;

    write << ct;

    return 0;
}