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.
[-63, -146, 0, -269, -623, -23, -368, -724, -654, 804, 990, -52, 587, -31, -264, 422]