0 x 0 = 0.
2 x 2 = 4.
4 x 4 = 16.
6 x 6 = 36.
8 x 8 = 64.
10 x 10 = 100.
12 x 12 = 144.
14 x 14 = 196.
16 x 16 = 256.
18 x 18 = 324.
20 x 20 = 400.
22 x 22 = 484.
24 x 24 = 576.
26 x 26 = 676.
28 x 28 = 784.
30 x 30 = 900.
32 x 32 = 1024.
34 x 34 = 1156.
36 x 36 = 1296.
38 x 38 = 1444.
40 x 40 = 1600.