PATTERN *1 121 12421 1248421*
public class Patern { public static void main(String[] args) { int i,j,k,space,s=8; for(i=1;i<32;i*=2) { for(space=s;space>0;space--) System.out.print(" "); System.out.print("1 "); for(j=2;j<=i;j*=2) { System.out.print(j+ " "); } j=j/2; for(k=j/2;k>=2;) { System.out.print(k+" "); k=k/2; } if(i>1) System.out.print("1 "); System.out.println(); s-=2; } } }