#include <iostream>
#include <fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int main()
{
    long n,i,j,nr=0;
    in>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
    {
        if(i==1||j==1)
            nr++;
        else if(i>j&&i%j)
            nr++;
        else if(i<j&&j%i)
            nr++;
    }
    out<<nr;
    return 0;
}