#include <fstream>
using namespace std;
int main ()
{
    int n,nr,j,i,r,a,b;
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {

            a=i;
            b=j;
            while(b!=0)
            {
                r=a%b;
                a=b;
                b=r;
            }
            if(a==1) nr++;
        }
    }
    g<<++nr;
    return 0;



}