[tex]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\\
[/tex]
[tex]16^2=256\\
17^2=289\\
18^2=324\\
19^2=381\\
20^2=400\\
21^2=441\\
22^2=484\\
23^2=529\\
24^2=576\\
25^2=625\\
26^2=676\\
27^2=729\\
28^2=784\\
29^2=841\\
30^2=900\\
31^2=961.[/tex]