#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)



#define rrep(i,a,b) for(int i=a;i>=b;i--)
int T;
double dp[1010101];
double p[7] = { 0, 1.0 / 12.0, 2.0 / 12.0, 3.0 / 12.0, 1.0 / 12.0, 3.0 / 12.0, 2.0 / 12.0 };
//-----------------------------------------------------------------
int main() {
	rep(i, 1, 1000001) {
		dp[i] = 1;
		rep(j, 1, 7) {
			if (i - j < 0) break;
			dp[i] += dp[i - j] * p[j];
		}
	}
	

	cin >> T;
	rep(i, 0, T) {
		int N; cin >> N;
		printf("%.10f\n", dp[N]);
	}
}