#include<fstream>
#include<vector>
using namespace std;
int N,P,Q,k;
int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    fin>>N;
    for(P=1;P<=N;P++)
    for(Q=1;Q<=N;Q++)
    {
        if(((P%Q!=0)&&(Q%P!=0))||(Q==1)||(P==1))
        k++;


    }
    fout<<k;
    return 0;
}