T=int(input())
dp=[0]*(10**6+6)
for i in range(6,10**6+6):
    dp[i]=1
    dp[i]+=dp[i-1]/12
    dp[i]+=dp[i-2]/6
    dp[i]+=dp[i-3]/4
    dp[i]+=dp[i-4]/12
    dp[i]+=dp[i-5]/4
    dp[i]+=dp[i-6]/6
for t in range(T):
    N=int(input())
    ans=dp[N+5]
    print(ans)