#include <iostream>
#include <fstream>

using namespace std;

unsigned cmmdc (unsigned a, unsigned b)
{
    int r;
    while(b)
    {
        r = a % b;
        a = b;
        b = r;
    }
    return a;
}

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

    unsigned p, q, n, Nr=0;
    f>>n;
    for(p=1; p<=n; p++)
        for(q=1; q<=n; q++)
        if(cmmdc(p,q) == 1)  Nr++;
    g<<Nr;
    return 0;
}