#include <iostream>
#include <fstream>



using namespace std;


ifstream fin("fractii.in");
ofstream fout("fractii.out");

int n,i,j,s=0;

int test(int a, int b)
{
    int c;
    while (b) {
        c = a % b;
        a = b;
        b = c;
    }
    return a;
}


int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
          {
           if(test(i,j)==1){s+=1;}

          }
    }

    fout<<s;
    return 0;
}