Page 86, Exercise 3 Column Major Form

The addressing formula is: α + j·upper₀ + i
where i is the row subscript, j is the column subscript and upper₀ is the size of the first
dimension, that is, the number of rows.

[0] = [0][0]
[1] = [1][0]
[2] = [0][1]
[3] = [1][1]
[4] = [0][2]
[5] = [1][2]

0·2 + 0 = 0
0·2 + 1 = 1
1·2 + 0 = 2
1·2 + 1 = 3
2·2 + 0 = 4
2·2 + 1 = 5