Definition: 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.
Input: [340, -81, -634, -955, -978, 720, -397, -525, -101, 114, 718, 886, -463, -273, -149, 56, -700, 807, 4]

[-525, -101, 4]