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.
[426, 224, -595, 189, 708, -527, -546, 292, -148, -630, 949, -632, 243, -521, 476, -990, 369, -821]