This solution comes from Chris. Well
done!
| 22 |
20 |
18 |
16 |
14 |
| 26 |
24 |
22 |
20 |
18 |
| 30 |
28 |
26 |
24 |
22 |
| 34 |
32 |
30 |
28 |
26 |
| 38 |
36 |
34 |
32 |
30 |
The diagonal is the same as +2, because it's the same as + 4
then - 2.
| 2 |
6 |
18 |
54 |
162 |
| 4 |
12 |
36 |
108 |
324 |
| 8 |
24 |
72 |
216 |
648 |
| 16 |
48 |
144 |
432 |
1296 |
| 32 |
96 |
288 |
864 |
2592 |
The diagonal is the same as x 6, because it's x 2 and then x 3.

The diagonal is the same as halving the width and doubling the
height at the same time.