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.
[-511, 472, -770, 663, -356, -166, -956, 744, 545, -997, 398, 42, 343, -643, 726, 433, -568, -419, -512, 137]