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.
[594, 561, 36, -757, -715, -30, 690, -516, 550, 302, -492, 341, 885, 233, -71, 21, -873, 806, 218, -451, -659]