#include <iostream>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");
int k;
int cm(int a,int b)
{
    int x;
    x=a%b;
    while(x!=0)
    {
        a=b;
        b=x;
        x=a%b;
    }
    return b;
}
int main()
{
    int n,i,j;
    f>>n;
    for(i=1;i<=n;++i)
        for(j=1;j<=n;++j)
            if(cm(i,j)==1) ++k;
    g<<k;
}