#include<iostream>
#include<fstream>
using namespace std;
int main()
{
    int i,j,k;
    long long int n,s;
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    s=n*n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            for(k=2;k<=n;k++)
            {
                if((i%k==0)&&(j%k==0))
                {
                    s=s-1;
                    break;
                }
            }
        }
    }
    g<<s;
    return 0;
}