#include <iostream>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");
int k;
int cm(int a,int b)
{
    while(a!=b)
        if(a>b) a-=b;
        else b-=a;
    return a;
}
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;
}