#include<fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int nr,i,j,x[1000000],h,a,b,c;

int main()
{
long n;
fin>>n;nr=0;
for(i=1;i<=n;i++)
{
    for(j=1;j<=n;j++)

    {a=j;b=i;
    while(b)
    {
        c=a%b;
        a=b;
        b=c;
    }
        if(a==1){
            nr++;}
    }
}fout<<nr;}