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.
[-221, 741, 368, 153, -453, -970, -534, -988, 571, -14, -122, 202, 544, 651, 559, -631, 831, -31, -653, 159, 537]