Write a function which creates
a list of the palindromic square
numbers less than a 100
billions.
6948496
6
9
4
6
9
4
Find the only number inside of this list which has an even number of digits.
Think of a way to test the result with the doctest module, knowing that 1, 4, 9, 121, 484, 676, 10201 are amongst those numbers.