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.
[-849, -339, 835, 453, -18, -304, -23, 806, -91, -434, 21, -665, 911, -380, 795, 354, 600, 996, 142, 116, 623]