#include <iostream>
#include <stdio.h>
#include <conio.h>
using namespace std;
//functie pentru cmmmc
int cmmdc(long a, long b)
{
int r;
r=a%b;
while(r!=0)
{
	a=b;
	b=r;
	r=a%b;
}
return b;
}
//functie principala
int main()
{
long n, q, p, x, k=0;
FILE *f;
FILE *g;
f=fopen("fractii.in","r");
g=fopen("fractii.out","w");
fscanf(f,"%ld",&n);
cout << '\n';
for(p=1;p<=n;p++)
{
	for(q=1;q<=n;q++)
	{
		x=cmmdc(p,q);
		if(x==1)
			k++;
	}
}
fprintf(g,"%ld",k);
fclose(f);
fclose(g);
return 0;
}