#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cstring>
#include <cmath>
#include <fstream>

using namespace std;

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

int cmmdc(int a, int b)
{
    while(b)
    {
        int r=a%b;
        a=b;
        b=r;
    }
    return a;
}

int main()
{
   int n, i, j, nrf=0;
   f>>n;
   for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
       if(cmmdc(i,j)==1)
        nrf++;
       g<<nrf;
}