x=[1.0/12.0,2.0/12.0,3.0/12.0,1.0/12.0,3.0/12.0,2.0/12.0]
for _ in range(int(input())):
    n=int(input())
    dp=[0.0]*(n+10)
    for i in range(n-1,-1,-1):
    	dp[i]=1.0
    	for j in range(1,7):
    		dp[i]+=dp[i+j]*x[j-1]
    print(dp[0])