import sequtils,strutils
const 
    N = 1e6.int
var
    P : array[-7..N + 10,float64]
    s : array[1..6,float64] = [1 / 12, 1 / 6, 1 / 4, 1 / 12, 1 / 4, 1 / 6]
    T = stdin.readline.parseInt
    k : int
    ans : float64
for n in 0..<N:
    P[n] = 1
for n in 1..N:
    for i,t in s:
        P[N - n - i] += t * P[N - n]
for n in 1..T:
    k = stdin.readline.parseInt
    ans = P[N - k]
    echo ans