• 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