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.
[20, 400, 684, -246, 119, 588, 868, 513, -934, 998, -396, -723, -500, -120, 668]