#include <iostream>
#include <fstream>
using namespace std;

int main()
{long long int i,j,nr,n,a,b,r;
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>n;
nr=n*n;
for(i=2;i<=n;i++)
{
    for(j=2;j<=n;j++)
    {
        a=i;
        b=j;
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        if(a!=1) nr--;
    }
}
g<<nr;
    return 0;
}