#include <iostream>
#include <math.h>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");

int main()
{
    int n, x = 0;
    f>>n;
    for (int i = 1; i  <=  n; i ++)
    { 
        for (int j = 1; j  <=  n; j ++)
        { 
            int a, b, rest;
            if (i < j)
            {
                a = j;
                b = i;
            }
            else
            {
                a = i;
                b = j;
            }
            do
            {
                rest=a%b;
                a=b;
                b=rest;
            }
            while (rest == 1);
            if (a == 1)
            {
                x = x + 1;
            }
        }
    }
    g<<x;
    return 0;
}