from functools import cache
import sys
sys.setrecursionlimit(10 ** 6 + 100)

probs = [0, 1/12, 2/12, 3/12, 1/12, 3/12, 2/12]


memo = {}
def f(x: int) -> float:
    if x <= 0: return 0

    if x in memo: return memo[x]

    res = 0
    for i in range(1, 7):
        res += (f(x - i) + 1) * probs[i]

    memo[x] = res
    return res


T = int(input())
for _ in range(T):
    N = int(input())
    ans = f(N)
    print(ans)