% Solution 4-16

%n=1; x = 1
%n=2; x = [0,2;1,2;0,1]
%n=3; x = [3,0,0;3,2,0;3,2,1;3,2,0;3,0,0]
%n=4; x = [0,0,0,4;0,0,3,4;0,2,3,4;1,2,3,4;0,2,3,4;0,0,3,4,;0,0,0,4]