import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    T = int(input())
    N = [int(input()) for i in range(T)]

    MAX = max(N)
    DP = [0]*(MAX+1)
    prob = [None, 1/12, 1/6, 1/4, 1/12, 1/4, 1/6]
    for i in range(1, MAX+1):
        DP[i] = 1
        for j in range(1, min(6, i)+1):
            DP[i] += prob[j] * DP[i-j]

    print(*map(lambda x: DP[x], N), sep='\n')


if __name__ == '__main__':
    main()