#include<fstream.h>
int main()
{ifstream fin("fractii.in");
int n,s=0,i,j,k,t;
fin>>n;
fin.close();
for(i=1;i<=n;i++)
{for(j=1;j<=n;j++)
 {t=i/j;
  s++;
  for(k=2;k<=n;k++)
  if((i%k==0)&&(j%k==0))s--;}
 }
s=s+1;
ofstream fout("fractii.out");
fout<<s;
return 0;}