#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int div(int a, int b)
{int i,maxx;
if(a>b) maxx=a;
else maxx=b;
for(i=2;i<=maxx;i++)
    if(a%i==0&&b%i==0) {return 1;
                        break;
                       }
    return 0;

}
int main()
{int i,j,c=0;
int n;
    f>>n;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
    if(div(i,j)==0) c++;
    g<<c;
    return 0;
}