#include <iostream>
#include<fstream>
using namespace std;
ifstream f ("fractii.in");
ofstream g ("fractii.out");
int n,i,j,c,r,d,a,b;
int main()
{f>>n;
for(i=1;i<=n;i++)
    for(j=1;j<=n;j++){a=i;b=j;
    while(b!=0){r=a%b;
                a=b;
                b=r;}
                d=a;
                if(d==1)c++;}
    g<<c;

    return 0;
}