project_euler.problem_028.sol1

Problem 28 Url: https://projecteuler.net/problem=28 Statement: 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 a 1001 by 1001 spiral formed in the same way?

Attributes

n

Functions

solution(→ int)

Returns the sum of the numbers on the diagonals in a n by n spiral

Module Contents

project_euler.problem_028.sol1.solution(n: int = 1001) → int

Returns the sum of the numbers on the diagonals in a n by n spiral formed in the same way.

>>> solution(1001)
669171001
>>> solution(500)
82959497
>>> solution(100)
651897
>>> solution(50)
79697
>>> solution(10)
537

project_euler.problem_028.sol1.n