#include <iostream>
#include <fstream>

using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
    int n,s=0,i,j,a,b,c;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
    {
        a=i;
        b=j;
        while(b)
        {
            c=a%b;
            a=b;
            b=c;
        }
        if(a==1)
            s++;
    }
    g<<s;
    f.close();
    g.close();
    return 0;
}