#include <iostream>
#include <fstream>
using namespace std;
int euclid(int a,int b)
{int r;
    r=a%b;
    while(r)
    {
        a=b;
        b=r;
        r=a%b;
    }
    if(b==1)
        return 1;
    return 0;
}
int n,i,j,nr;
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            if(euclid(i,j))nr++;
        cout<<nr;
}