#include <iostream>
#include <fstream>


using namespace std;

int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    int n,i,j,nr=0,x,y,r;
    fin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            x=i;
            y=j;
            while(y)
            {
                r=x%y;
                x=y;
                y=r;
            }
            if(x==1) nr++;
        }
    fout<<nr;
    return 0;
}