Definition: 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.
Input: [85, -685, 230, 821, -507, 121, -441, -461, 166, 313, 100, -438, 313, 850, 729]

[121, 313, 313]