#include<iostream>
#include<fstream>
using namespace std;
int main ()
{
    ifstream cin("fractii.in");
    ofstream cout("fractii.out");
    int p,q,n,nr=0;
    cin>>n;
    for(p=1;p<=n;p++)
        for(q=1;q<=n;q++)
           {
            if(p==1||q==1)
                nr++;
            if(p<q&&q%p!=0)
                nr++;
            if(p>q&&p%q!=0)
                nr++;

}
    cout<<nr;
    return 0;
}