#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
long n,nr,i,j,x,y;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
    {
        x=i;
        y=j;
        while(x!=y)
        {
            if(x>y)
                x=x-y;
            else y=y-x;
        }
        if(x==1)
            nr++;
    }
    g<<nr;
    f.close();
    g.close();
}