#include <iostream>
#include <algorithm>
#include <fstream>
using namespace std;
int a,b;
ifstream f("fractii.in");
ofstream g("fractii.out");
int cmmdc(int x, int y)
{    int r;
     while (y) {r=x%y; x=y; y=r;}
   if (x==1) return 1; else return 0;

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