#include <iostream>
#include <fstream>
using namespace std;
int nr=0,i,j,n,x,z;
int main()
{
    ifstream f ("fractii.in");
    ofstream g ("fractii.out");
    f>>n;
    for (i=1;i<=n;i++)
        for (j=1;j<=n;j++)
        {
            x=i;
            z=j;
            while (x!=z)
                if (x>z)
                    x=x-z;
                else
                    z=z-x;
            if (x==1 || z==1)
                nr++;
        }
    g<<nr;
    return 0;
}