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.
[551, -11, 946, 818, -737, 925, -687, 314, 642, 251, -855, 123, -297, -928, -633, 506]