#include <iostream>
#include <fstream>

using namespace std;
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int n, i, j, p, x, y; p=0;
    f>>n;
    for (i=1; i<=n; i++)
    {
        for (j=1; j<=n; j++)
        { x=i; y=j;
        while (x!=y)
        {
            if (x>y) x=x-y;
            else y=y-x;
        }
        if (x==1) p++;}

    }
    g<<p;
    return 0;
}