#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
    int n,q,p,k,pp,qq;
    f>>n;
    k=0;
    for (p=1;p<=n;p++)
    for (q=1;q<=n;q++)
    {

        pp=p;
        qq=q;
        while (pp!=qq)
        {
            if (pp>qq) pp=pp-qq;
            else qq=qq-pp;
        }
        if (pp==1) k++;
    }
    g<<k;
    f.close();
    g.close();
    return 0;
}