#include <fstream>

using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int euclid(int a,int b)
{
    while(a>0&&b>0)
        if(a>b)
            a=a%b;
        else
            b=b%a;
   return a+b;
}
int main()
{ int a,b,T,C=0;

   fin>>T;
   for(int a=1;a<=T;a++)
    for(int b=1;b<=T;b++)
   {if(euclid(a,b)==1) C++;

    }
   fout<<C;
    return 0;
}