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