#include <fstream>
using namespace std;
ifstream cin("fractii.in");
ofstream cout("fractii.out");
int main(){
    int n,cnt=0;
    cin>>n;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++){
            int a=i;
            int b=j;
            int rest=a%b;
            while(b>0){
                rest=a%b;
                int c=b;
                b=rest;
                a=c;
            }
        if(a==1)
            cnt++;
    }
    cout<<cnt;
}