using namespace std;
#include<fstream>
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
	int n,p,q,contor=0;
	fin>>n;
	for(p=1;p<=n;p++)
		{for(q=1;q<=n;q++)
			if((p%q!=0&&q%p!=0)||(p==1)||(q==1))
				contor++;
		}
	fout<<contor;
}