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.
[290, -920, 358, -659, 64, 331, -112, 901, 12, 949, 917, 321, 422, 29, -359, -321, 257]