#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream fin("fractii.in");
    ofstream fou("fractii.out");

    int n,nr,a,b;
    fin>>n;
    nr=0;
    for(int i=1;i<=n;++i)
    {
        for(int 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++;
            }
        }
    }
    fou<<nr;
    return 0;
}