1 x 1 =
2 x 2 =
3 x 3 =
4 x 4 =
5 x 5 =
6 x 6 =
7 x 7 =
8 x 8 =
9 x 9 =
10 x 10 =
11 x 11 =
12 x 12 =
13 x 13 =
