#include <fstream>
using namespace std;
int cmmdc(int m,int n)
{
    int r;
    while(n!=0)
    {
        r=m%n;
        m=n;
        n=r;
    }
    return m;
}
int main()
{
    int N,P,Q,nr=0;
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>N;
    for(P=1;P<=N;P++)
        for(Q=1;Q<=N;Q++)
        if(cmmdc(P,Q)==1)
           nr++;
    g<<nr;
    return 0;
}