#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("fractii.in");
ofstream fout("fractii.out");

int main()
{
    unsigned int N, i, j, k, nr = 0, var_bool;
    fin>>N;
    for(i = 1; i <= N; i++)
        for(j = 1; j <= N; j++){
            if(i % j){
                var_bool = 1;
                for(k = 2; k <= i && k <= j; k++)
                    if(i % k == 0 && j % k == 0)
                        var_bool = 0;
                if(var_bool)
                    nr++;
                }
            }
    fout<<nr;
}