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.
[921, -292, 492, 446, 482, 824, 17, -649, 9, 159, 42, -431, -592, -657, -86, -213, 110, -860, 712]