#include <iostream>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");
int cmmdc(int a, int b)
{
    int r=a%b;
    while (r!=0)
    {
        a=b;
        b=r;
        r=a%b;
    }
    return b;
}
int fractie(int n)
{
    int nr=0,c;
    for (int i=1;i<=n;i++)
        for (int j=1;j<=n;j++)
        {
            if (i==1 && j==1)
                nr++;
            else
                {
                    c=cmmdc(i,j);
                    if (i/c==i && j/c==j)
                        nr++;
                }
        }
    return nr;
}
int main()
{
    int n;
    while (f>>n)
        g<<fractie(n)<<endl;
    return 0;
}