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.
[-771, 788, -551, 949, -994, -638, 390, 800, 321, -411, 229, 391, 132, 197, -890, -847, -473, -573, 121]