#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
    int n,i,j,a,b,r,s=0;
    fin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
    {
        a=i;
        b=j;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        if(a==1) s++;
    }
    fout<<s;
    return 0;
}