#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int cmmdc(int a,int b){
    while(a!=b){
        if(a>b){a=a-b;}
        if(b>a){b=b-a;}
    }
    if(a!=1 && b!=1){return 0;}
    else{return 1;}
}
int main()
{
    int n,i,j,S=0;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++){
            if(cmmdc(i,j)){S++;}
        }
        g<<S;
}