#include <iostream>
#include <fstream>
using namespace std;
bool prime(int a, int b){
    int r;
    while(b){
        r=a%b;
        a=b;
        b=r;
    }
    if(a==1)
       return true;
    else
        return false;
}
int main()
{
    ifstream read("fractii.in");
    ofstream write("fractii.out");
    int n, c=0;
    read>>n;
    for(int i=1; i<=n;i++)
    for(int j=1;j<=n;j++){
        if(prime(i,j))
            c++;
    }
    write<<c;
    return 0;
}