#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
    int p,q,n,k=0,r,a,b;
    f>>n;
    for(p=1;p<=n;p++)
        for(q=1;q<=n;q++)
            {
            a=p,b=q;
            r=a%b;
            while(r)
            {
                a=b;b=r;r=a%b;
            }
            if(b==1) k++;
            }
    g<<k;
    g.close();return 0;
}