#include <fstream>    
 using namespace std;    
     
 int main()    
 {    
     ifstream fin("fractii.in");    
     ofstream fout("fractii.out");    
     unsigned long int q,i,n,c=0,j,a;    
     fin>>n;   
     for(i=1;i<=n;i++)    
     {    
                      for(q=1;q<=n;q++)    
                 {    
                        a=0;    
                         for(j=2;j<=i;j++)    
                            if(i%j==0&&q%j==0){a=1;break;}    
                         if(a==0)c++;    
                   }    
                                
     }    
       
     fout<<c;      
     return 0;    
 }