matrix := [
[0,0,6,0,0,0,0],
[0,11,11,0,0,0,0],
[6,12,6,0,0,0,0],
[0,0,0,0,6,0,0],
[0,0,0,0,0,0,6],
[2,4,0,7,15,6,12],
[0,0,0,6,0,0,0]
]*Z(17);