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