#include <bits/stdc++.h>

using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int cmmdc(int a, int b)
{
    int r;
    r=a%b;
    while(b)
    {
        r=a%b;
        a=b;
        b=r;
    }
    if(a==1)return true;
}
int n,i,j,nr;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            if(cmmdc(i,j)==true)nr++;
        }
    }
    g<<nr;
    return 0;
}