Help me in solving CHESSCOLOUR problem

help
,
1

My issue

why is hidden test case failing

My code

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef {
    public static void main(String[] args) throws java.lang.Exception {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        for (int i = 0; i < t; i++) {
            int n = sc.nextInt();
            System.out.println(n);
            if (n % 2 == 0) {
                System.out.println(2);
            } else {
                System.out.println((n * n) / 2 + 2);
            }
        }
        sc.close();
    }
}

Problem Link: Chess Colouring Practice Coding Problem