#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 = i, b = j;
            while (a != b)
            {
                if (a > b)
                {
                    a = a - b;
                }
                else
                {
                    b = b - a;
                }
            }
            if (a == 1)
            {
                x = x + 1;
            }
        }
    }
    g<<x;
    return 0;
}