#include <fstream>

using namespace std;

ifstream in("fractii.in");
ofstream out("fractii.out");

int cmmdc(int nr1,int nr2)
{
    int num1=nr1,num2=nr2;
    while(num1!=num2)
    {
        if(num1>num2)
        {
            num1-=num2;
        }
        else
            num2-=num1;
    }
    return num1;
}

int main()
{
    int n,p,q,cnt=0;
    in>>n;
    for(p=1;p<=n;p++)
    {
        for(q=1;q<=n;q++)
        {
            if(cmmdc(p,q)==1)
            {
                cnt++;
            }
        }
    }
    out<<cnt;
}