t = int(input())
M = 10**6
dp = [0.0]*(M+1)
p = [0,1/12,1/6,1/4,1/12,1/4,1/6] #試行錯誤で見つけた
for i in range(1,M+1):
    r = 0.0
    for j in range(1,7):
        r += dp[i-j]*p[j] if i-j > 0 else 0        
    dp[i] = 1.0 + r

for _ in range(t):
    print(dp[int(input())])