import sys
input = sys.stdin.readline
L = [1.0/12.0, 1.0/6.0, 1.0/4.0, 1.0/12.0, 1.0/4.0, 1.0/6.0]

def solve(N):
    dp = [1.0] * (N + 1)
    dp[-1] = 0
    for i in range(N, -1, -1):
        for j in range(1, 7):
            dp[i] += dp[min(N, i + j)] * L[j - 1]
    print(dp[0])

T = int(input())
for _ in range(T):
    solve(int(input()))