HW4.19

 public class Solution
 {
     public static void main(String[] args)
     {
         for(int i = 1; i <= 8; i++)
         {
             for(int j = 8 - i; j > 0; j--)
                 System.out.print("  ");
             for(int j = 1; j <= i; j++)
                 System.out.print((int)(Math.pow(2, j - 1)) + " ");
             for(int j = i - 1; j >= 1; j--)
                 System.out.print((int)(Math.pow(2, j - 1)) + " ");
             System.out.println();
         }
     }
 }