#include <iostream>
#include <fstream>
using namespace std;
int euclid(int a, int b);
int main()
{
    ifstream in("fractii.in");
    ofstream out("fractii.out");
    int p,q,n;
    in>>n;
    int i=0;
    for(p=1;p<=n;p++)
    {
        for (q=1;q<=n;q++)
        {
            if(euclid(p,q)==1) i++;
        }
    }
    out<<i;
}

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