Problem 28: Number spiral diagonals
Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows:
21
22 23 24
25
20
7
8
9
10
19 6
1
2 11
18
5
4
3
12
17
16 15 14
13
It can be verified that the sum of the numbers on the diagonals is 101.
What is the sum of the numbers on the diagonals in an n by n spiral formed
in the same way?
Test
{{test}}Console output