#include "bits/stdc++.h"
using namespace std;
#define MAX 1000005

double dp[MAX];
double p[]{1.0 / 12, 2.0 / 12, 3.0 / 12, 1.0 / 12, 3.0 / 12, 2.0 / 12};

int main(){
	for (int i = 1; i < MAX; i++)
	{
		for (int j = 1; j <= min(6, i - 1); j++)
		{
			dp[i] += dp[i - j] * p[j - 1];
		}
		dp[i] += 1;
	}
	int T;
	cin >> T;
	for (int i = 0; i < T; i++)
	{
		int N;
		cin >> N;
		printf("%.14f\n", dp[N]);
	}

}