#include <fstream>

using namespace std;

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

int pie(int a, int b)
{
    while(b)
    {
        int r = a % b;
        a = b;
        b = r;
    }

    if(a == 1)
        return 1;
    else
        return 0;
}

int main()
{
    int n, cnt = 0;
    fin >> n;

    for(int i = 1; i <= n; ++i)
        for(int j = 1; j <= n; ++j)
            if(pie(i, j))
                cnt++;

    fout << cnt;
    return 0;
}