#include <iostream>
#include <fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int main()
{
    int N,nr=0,i,j,k,nu;
    cin>>N;
    for (i=1; i<=N; i++)
        for (j=1; j<=N; j++){
            nu=0;
            for(k=2; k<=N; k++){
                    if ((i%k==0) && (j%k==0))nu=1;
             if (nu==0)nr++;}
            }
cout<<nr;
}