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