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.
[87, 639, 198, 921, -236, -44, -564, -747, 790, 334, 321, -591, 128, 905, 588, 899, -493, 990, 341, 311]