#include <iostream>
#include <fstream>
#include <math.h>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,i,j,k,nr,ok;
int main()
{
  f>>n;nr=n*n;
  for (i=1;i<=n;i++)
   for (j=1;j<=n;j++)
   {ok=1;
       for (k=2;k<=min(i,j);k++)if (i%k==0 && j%k==0  && ok==1){nr--;ok=0;}
   }
   g<<nr;
   f.close();
   g.close();
    return 0;
}