1^2 =
1
2^2 =
4
3^2 =
9
4^2 =
16
5^2 =
25
6^2 =
36
7^2 =
49
8^2 =
64
9^2 =
81
10^2 =
100
11^2 =
121
12^2 =
144
13^2 =
169
14^2 =
196
15^2 =
225
16^2 =
256
17^2 =
289
18^2 =
324
19^2 =
361
20^2 =
400