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.
[-637, 771, 842, -834, 427, -621, -190, -650, -959, 384, 15, -637, -397, -198, 526, -657]