#include<fstream>
using namespace std;
int a[1002],j,i,n,nr;
int cmmdc(int x,int y)
{
    int r=0;
    while(y)
    {
        r=x%y;
        x=y;
        y=r;

    }
    return x;
}
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        if(cmmdc(i,j)==1)
        nr++;
       //g<<i<<j<<" ";}
    g<<nr;
return 0;
}