In this task you will be given a list of integers. You should only return an integer if the first digit is the same as the last digit in the number. If an integer has a single digit, then it should be returned. If there are no integers that start and end with the same digit then an empty list ("[]") should be returned.
[591, 91, 283, 633, 215, -264, -5, -354, -307, 517, -639, -258, -493, -66, -407]