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.
[-929, -897, 487, 621, -120, -397, 317, 654, 213, -444, -37, 218, 258, -684, -409, -491, 613, 137]