``` public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); for (int i = 1; i <= n; i++) { int m=0,k=1,t=0; Stack stack = new Stack(); System.out.printf(k+" "); stack.push(k); for (int j = 2; j <= i; j++) { if(j != i){ stack.push(m+k); } System.out.printf(m+k+" "); t=m; m=k; k=t+k; } for (int j = i+1; j <= (2*i-1); j++) { System.out.printf(stack.pop()+ " "); } System.out.println(""); } scanner.close(); } } ```