#include <iostream>
#include <fstream>

using namespace std;

ifstream input("fractii.in");
ofstream output("fractii.out");

int main()
{
    int N, a, b, r, cateisba = 0;
    input >> N;
    for(int i = 1; i <= N; i++) {
        for(int j = 1; j <= N; j++) {
            a = i; b = j;
            while(b != 0) {
                r = a % b;
                a = b;
                b = r;
            }
            if(a == 1)
                cateisba++;
        }
    }
    output << cateisba;
    return 0;
}