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.
[-493, 506, 216, -259, 715, 380, 392, 40, -629, -158, -720, -389, 104, -524, -394, -451, 285, 336, 618]