#include<fstream>
using namespace std;
bool maxim(int a, int b)
{
    return a>b;
}
bool prime(int x, int y)
{
    int r;
    if(maxim(x,y)==1)
    {

        while(x%y!=0)
        {
            r=x%y;
            x=y;
            y=r;
        }
        return y;
    }
    else
    {

        while(y%x!=0)
        {
            r=y%x;
            y=x;
            x=r;
        }
        return x;
    }

}
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int n,i,j,k,nr=0;
    f>>n;
    for(i=1; i<=n; i++)
        for(j=1; j<=n; j++)
           if(prime(i,j)==1)
            nr++;
            g<<nr;
    return 0;
}