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.
[721, 140, -504, -863, -345, 729, 759, 394, 100, -934, -437, -232, -617, -164, 700, -909, -607, 467, 272, -699, 794, -849]