#include <iostream>
#include <fstream>

using namespace std;
int cmmdc(int a,int b)
{
    int c;
    while (b)
    {
        c=a%b;
        a=b;
        b=c;
    }
    return a;
}
int main()
{
    int p, q, nr=0;
    fstream fin("fractii.in"), fout("fractii.out");
    fin >> n;
    for (p=1; p<=n; p++)
        for (q=1; q<=n; q++)
            if (cmmdc(p,q)==1) nr++;
    fout << nr;
    return 0;
}