/*
    Nume:Temian
    Date:
    Problema:
*/
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    unsigned long int p,q,i,n,c=0,j,a;
    fin>>n;
    fin.close();
    for(i=1;i<=n;i++)
    {
    				 p=i;
    				 for(q=1;q<=n;q++)
				{
	                   a=0;
                        for(j=2;j<=p;j++)
                           if(p%j==0&&q%j==0){a=1;break;}
                        if(a==0)c++;
		          }
                           
    }
    fout<<c;
    fout.close();
    system ("pause");
    return 1;
}