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.
[-336, -453, -261, -172, 185, -907, -621, 319, 239, -530, 84, 304, 902, -670, -657, 12, -194]