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.
[175, 373, -596, -533, 604, -331, -409, -330, 542, -111, -937, -432, 851, 685, 580, -321, -966, 15, -4]