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.
[-423, 146, -806, -614, 342, -656, 958, -151, 608, -158, 74, -40, 514, -588, -726, 640, -738, -1000, 37, -613, 251]