count number of binary strings

import java.util.*;
public class BinaryStrings {

	public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);
        int T = scn.nextInt();
        int count = 1;
        while(count<=T){
            	int n = scn.nextInt();

		int[] a = new int[n + 1];

		int[] b = new int[n + 1];

		a[1] = 1;

		b[1] = 1;

		for (int i = 2; i <= n; i++) {

			a[i] = a[i - 1] + b[i - 1];

			b[i] = a[i - 1];

		}

		System.out.println(a[n] + b[n]);
		count++;

        }
	
	}

}