#include <bits/stdc++.h>

using namespace std;

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

bool prime (int a, int b){
    int c;
    while (b) {
        c = a % b;
        a = b;
        b = c;
    }
    if (a == 1)
        return true;
    else
        return false;
}

int main(){
    int n, k = 0;
    in >> n;
    for (int p = 1; p <= n;++p)
        for (int q = 1; q <= n;++q){
            if (prime(p, q))
                k++;
        }
    out << k;
}