#include<iostream.h>
#include<fstream.h>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int cmmmc(int x,int y) {
	while(x!=y) { if(x>y) x=x-y;
	               else y=y-x; }
	if(x==1) return 1;
	 else return 0; }
int main() {
long n,m,i,j;	
f>>n;
for(i=1;i<=n;i++)
	for(j=1;j<=n;j++)
		if(cmmmc(i,j)==1) m++;
g<<m; }