#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int a,i,j,c,r,s;
    f>>a;
    c=0;
    for(i=1;i<=a;i++)
    {
        for(j=1;j<=a;j++)
        {
            r=i;
            s=j;
            while(r!=s)
            {
                if(r>s) r=r-s;
                if(r<s) s=s-r;
            }
            if(r==1) c++;
        }
    }
    g<<c;
    return 0;
}