#include <bits/stdc++.h>
using namespace std;
int Q, N; double dp[1000009];
double r[] = { 1.0 / 12, 1.0 / 6, 1.0 / 4, 1.0 / 12, 1.0 / 4, 1.0 / 6 };
int main() {
	dp[0] = 0.0;
	dp[1] = 1.0;
	dp[2] = 13.0 / 12;
	dp[3] = 181.0 / 144;
	dp[4] = 2653.0 / 1728;
	dp[5] = 35077.0 / 20736;
	for(int i = 6; i <= 1000000; i++) {
		for(int j = 1; j <= 6; j++) dp[i] += dp[i - j] * r[j - 1];
		dp[i] += 1;
	}
	cin >> Q;
	while(Q--) {
		cin >> N;
		cout << fixed << setprecision(15) << dp[N] << endl;
	}
	return 0;
}