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.
[256, -59, -32, 692, -13, 557, -873, -507, 326, 40, 373, 231, -537, -881, 604, 213, 723, 844, -517, 167, -946]