array[1,1] = 1
array[1,2] = 2
array[1,3] = 3
array[1,4] = 4
array[2,1] = 2
array[2,2] = 4
array[2,3] = 6
array[2,4] = 8
array[3,1] = 3
array[3,2] = 6
array[3,3] = 9
array[3,4] = 12