#include <iostream>
#include <fstream>
using namespace std;
int main()
{
    ifstream in("fractii.in");
    ofstream out("fractii.out");
    int n, i, j, z=0;
    in>>n;

    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            if(i==1 || j==1)
                z++;
            else if((i%j!=0) && (j%i!=0))
                z++;
        }

    out<<z;
    in.close();
    out.close();
    return 0;
}