In this challenge, establish if a given integer num is a Curzon number. If 1 plus 2 elevated to num is exactly divisible by 1 plus 2 multiplied by num, then num is a Curzon number.
Given a non-negative integer num, implement a function that returns true is num is a Curzon number, or false if it's not.
is_curzon?(5) ➞ true
# 2 ** 5 + 1 = 33
# 2 * 5 + 1 = 11
# 33 is a multiple of 11
is_curzon?(10) ➞ false
# 2 ** 10 + 1 = 1025
# 2 * 10 + 1 = 21
# 1025 is not a multiple of 21
is_curzon?(14) ➞ true
# 2 ** 14 + 1 = 16385
# 2 * 14 + 1 = 29
# 16385 is a multiple of 29N/A