S = [0]*7
S[1],S[2],S[3],S[4],S[5],S[6] = 1/12,2/12,3/12,1/12,3/12,2/12
def solve():
    n = int(input())
    dp = [0]*(n+6)
    for i in range(n)[::-1]:
        count = 0
        for j in range(1,7):
            count += dp[i+j]*S[j]
        dp[i] = count+1
    return dp[0]

t = int(input())
for i in range(t):
    print(solve())