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.
[991, 997, 267, 215, 315, -155, -440, -97, 377, -474, 481, -517, -518, -279, 943, -509, -391, 29, -359, 583, 837]