#include <iostream>
#include <fstream>

using namespace std;
int i,j,n;
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    int v[n],a[n],r,nr=0,nr1=0,aux,aux1;
    for(i=1;i<=n;i++)
        v[i]=i;
    for(j=1;j<=n;j++)
        a[j]=j;
        for(i=1;i<=n;i++)
            for(j=1;j<=n;j++)
            nr++;
            for(i=2;i<=n;i++)
            for(j=2;j<=n;j++){
                if(i==j || i%j==0 || j%i==0)
                    nr--;
                }
        g<<nr;
    return 0;
}