https://otvet.mail.ru/question/202776478

public class Main {
    public static void main(String args[]) {
        int number;
        try {
            number = Integer.parseInt(args[0]);
        } catch (Exception ex) {
            number = 3;
        }

        for (int i = 1; i <= number * number; i++) {
            System.out.print(i + ' ');
            if (i % number == 0) System.out.println();
        }
        System.out.println();

        int array[] = new int[number * number];

        for (int i = 0; i < number; i = i + 2) {
            for (int j = 0; j < number; j++) {
                array[j + i * number] = j * number + i + 1;
            }
        }

        for (int i = 1; i < number; i = i + 2) {
            for (int j = 0; j < number; j++) {
                array[j + i * number] = number * number - (j + 1) * number + i + 1;
            }
        }

        for (int i = 0; i < array.length; i++) {
            System.out.print(array[i] + ' ');
        }
    }
}