#include <bits/stdc++.h>
using namespace std;


double dp[1000020] = {}, prob[1000020] = {};
int main() {
    const double dice[] = {0, 1.0 / 12, 1.0 / 6, 1.0 / 4, 1.0 / 12, 1.0 / 4, 1.0 / 6};

    prob[0] = 1;
    for (int i = 0; i < 1000005; i++) {
        for (int j = 1; j <= 6; j++) {
            dp[i + j] += (dp[i] + prob[i]) * dice[j];
            prob[i + j] += prob[i] * dice[j];
        }
    }

    int T;
    cin >> T;
    while (T--) {
        int N;
        cin >> N;
        double ans = 1;
        for (int i = max(0, N - 6); i < N; i++) {
            for (int j = 1; j <= 6; j++) {
                if (i + j >= N)
                    ans += dp[i] * dice[j];
            }
        }
        cout << fixed << setprecision(10) << ans << endl;
    }
}