#include<fstream>


using namespace std;
int cmmdc(int a,int b)
{int aux,r;
	   if(a<b)
       {aux=a;
         a=b;
         b=aux;
       }
     r=a%b;
    while(r!=0)
       {
         a=b;
         b=r;
         r=a%b;
       }
   return b;

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