#include <iostream>
#include <fstream>
using namespace std;

int cmmdc(int x, int y);


int main()
{
    ifstream in("fractii.in");
    ofstream out("fractii.out");
    int n, i, j, z=0;
    in>>n;

    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++){
            if(cmmdc(i,j)==1)
                z++;
        }



    out<<z;
    in.close();
    out.close();
    return 0;


}

int cmmdc(int x, int y)
{
    int t;
    while (y != 0)
    {
        t = y;
        y = x % y;
        x = t;
    }
    return x;
}