matrix := [
[0,6,0,0,0,0,0],
[6,0,0,0,0,0,0],
[0,0,0,6,0,0,0],
[0,0,6,0,0,0,0],
[0,0,0,0,0,6,0],
[0,0,0,0,6,0,0],
[4,4,16,16,9,9,11]
]*Z(17);