Square

Squaring a number is the process of multiplying it by itself. n squared is denoted as n2. For example 42 (4 squared) is equal to 4 x 4 which is equal to 16. it can also be characterized by a unary function.
If a number is a square of an integer, it is called perfect square.
Here are the first 25 natural numbers squaredOEIS, Sequence A000290 (accessed 2020-11-23):
Number	Its value squared
1 	1
2 	4
3 	9
4 	16
5 	25
6 	36
7 	49
8 	64
9 	81
10 	100
11 	121
12 	144
13 	169
14 	196
15 	225
16 	256
17 	289
18 	324
19 	361
20 	400
21 	441
22 	484
23 	529
24 	576
25 	625
==Uses in googology==
*The original formulation of Bashicu matrix system uses squaring as its activation function.
==Sources==
Category:Functions