#include<iostream.h>
#include<fstream.h>
fstream f("fractii.in",ios::in);
fstream g("fractii.out",ios::out);
int main()
{
int n,i,j,k=0,a,b,rest;
f>>n;
for (i=1;i<=n;i++)
	     for (j=1;j<=n;j++)
			   {
			   a=i;
			   b=j;
			   rest=a%b;
			  while (rest!=0)
			  {
			 a=b;
			 b=rest;
			 }
			 if (b==1) k++;
			 }
g<<k<<endl;
return 0;
}