#include <iostream>
#include <fstream>
using namespace std;
ifstream f("frati.in");
ofstream g("frati.out");
int cmmdc(int a,int b)
    {int r;
        r=a%b;
    while(r)
    {
        a=b;b=r;r=a%b;
    }return b;
    }
int main()
{   int n,i,j,s=0;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
      {
          if(cmmdc(i,j)==1)s++;}
    g<<s;

    return 0;
}