enum M{M;int i,j,k,l;{int[]a=new int[44];for(a[0]=1;i++<20;a[k]=-~i/2+1)for(k=k<1?22:0,j=l=0;j<i;System.out.print(l+(j<i?" ":"\n")))a[k+i-j]=l+(l=a[22-k+j++]);}}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).