#include<fstream>
using namespace std;
ifstream f("fractii.in");ofstream g("fractii.out");
int N,p,i,j,a,y,b,aux,aux2;
double P,Q;
int main ()
{
	f>>N;
	P=1;
	Q=1;
	while (P<=N && Q<=N){
		for (P=1;P<=N;P++)
			for (Q=1;Q<=N;Q++){
				if (P==1 && Q==1){
					a++; }
				if ((int(Q)%2==0 && int(P)%2!=0) || (int(P)%2==0 && int(Q)%2!=0)){
					a++;}
				if (int(Q)%2!=0 && int(P)%2!=0){
					if (Q/P!=1 || P/Q!=1)
					a++;}
			}
	}
	g<<b+a;
	return 0;
}