#include <iostream>
#include <fstream>
using namespace std;

fstream f("fractii.in",ios::in);
fstream g("fractii.out",ios::out);
int cmmdc(int m,int n)
{
	

}
int main()
{
	int n,cont=0;
	f>>n;
	for(int i=2;i<=n;i++)
		for(int j=2;j<=n;j++)
		{

			  if(i==j)continue;
			  if((i+j)%2==0)continue;
			  if(i%j!=0)	
				  cont++;
									
		}

	g<<cont+(2*n-1);
	
}