/* 
 * File:   main.cpp
 * Author: danut
 *
 * Created on February 25, 2012, 2:33 PM
 */

//#include <cstdlib>
//#include <stdio.h>
//#include <iostream.h>
//#include<math.h>
//#include <stdlib.h>
#include <fstream.h>
//using namespace std;

/*
 * 
 */
long int n,s,i,j,f;
ifstream in("fractii.in");
    ofstream out("fractii.out");
int main() {
   
    
    in>>n;
    s=n;
   for (i=2;i<=n;i++) 
     for (j=1;j<=n;j++) if((((i%j!=0)||(i/j==i))&&(j%i!=0))&&((i%2!=0)||(j%2!=0))) s=s+1;
    
    
    //f=s-n-2;
    out<<s;
    return 0;
}