#include <fstream>

using namespace std;

ifstream input("fractii.in");
ofstream output("fractii.out");
int nMax,n,p=1,q=1,c=0;

bool divide(int n1,int n2)
{
    nMax=n1<n2?n1:n2;
    for(int i=2; i<=nMax; i++)
    {
        if(n1%i==0&&n2%i==0)
        {
            return false;
        }
    }
    return true;
}
int main()
{
    input>>n;
    while(p<=n)
    {
        while(q<=n)
        {
            if(divide(p,q))c++;
            q++;
        }
        q=1;
        p++;
    }
    output<<c;
}