#include <fstream>

using namespace std;

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

int n,i,j,k,a,b,c;

int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        for(j=1; j<=n; j++)
        {
            a=i;
            b=j;
            c=0;
            while(b)
            {
                c=a%b;
                a=b;
                b=c;
            }
            if(a==1)
                k++;
        }
    g<<k;
    return 0;
}