#include <fstream>

using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,p,q,i,j;
int main()
{f>>n;
for(i=1;i<=n;i++)for(j=1;j<=n;j++)if(i%j!=0 || j%i!=0)nr++;
g<<nr+1;

    return 0;
}