### Project Euler - problem 28

Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows:

2122 23 2425

2007080910

19 060102 11

1805040312

1716 15 1413

It can be verified that the sum of the numbers on the diagonals (CM: **in bold**) is 101.

What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral formed in the same way?