#include "iostream"
#include "iomanip"
#include "math.h"
using namespace std;

long double N;
long double ans;
long double num[100000];

int main() {
	cin >> N;
	for (int i = 100000; i >= 1; i--) {
		num[i] = (N + i)*(N + i);
		ans += 1.0/num[i];
		cout << setprecision(20) << ans << "\n";
	}

	cout << setprecision(20) << ans << "\n";
	return 0;
}