#include <iostream>
#include <fstream>
using namespace std;
int cmmdc(int a,int b)
{
    while(a!=b)
    if(a>b) a=a-b;
    else b=b-a;
    return a;
}
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int n,i,j,r=0;
    f>>n;
    for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
    {
        r++;if(cmmdc(i,j)!=1) r--;
    }
    g<<r;
}