#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");

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

int main()
{
    int n, i, j, k = 0;
    f >> n;
    for ( i = 1; i <= n; ++i)
    {
        for ( j = 1; j <= n; ++j)
        {
            if( cmmdc(i, j) == 1 || cmmdc(j, i)== 1) ++k;
        }
    }

    g << k;
    return 0;
}