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.
[-307, -333, 657, 429, -187, -160, -671, -617, -879, 428, 655, 71, 550, 778, -606, -642, 688]