#include <iostream>
#include <fstream>
#include <string.h>
#include <math.h>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");

int cmmdc(int n,int m){
    int r;
    while(m){
        r=n%m;
        n=m;
        m=r;
    }
    return n;
}

int v[100],n;

int main(){
    long i,j,aux,k,a,s=0;
    f>>n;
    for(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
            if(cmmdc(i,j)==1){
                s++;
            }
        }
    }
    g<<s;


    return 0;
}