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

int verificare_ireductibilitate (int i, int j)
{
    int r;
    while (j!=0)
    {
        r=i%j;
        i=j;
        j=r;
    }
    if(i!=1)
        return 1;
    else
        return 0;
}
int main()
{
    int N,nr=0,i,j;
    ifstream f("fractii.in");
    f>>N;
    f.close();
    for (i=1; i<=N; i++)
        for (j=1; j<=N; j++)
        {
            if(verificare_ireductibilitate(i,j))
                nr++;
        }
    ofstream g("fractii.out");
    g<<nr;
    g.close();
    return 0;
}