# Number spiral diagonals

# Find the sum of the numbers on the diagonals of a 1001 by 1001 spiral



def sumSpiralDiagonals(n):
	assert n % 2 == 1

	if n == 1:
		return 1

	result = 0
	corner = 1
	for i in range(1, n+1, 2):
		if i == 1:
			result += corner
		else:
			for j in range(4):
				corner += i - 1
				result += corner

	return result

def main():
	print("Hello, this is Patrick")

	print(sumSpiralDiagonals(1001))

if __name__ == "__main__":
	main()