Final answer:
The given sequence is an arithmetic sequence with a constant difference of 3 between consecutive terms.
Step-by-step explanation:
The given sequence, an = 4 * 3(n-1), represents an arithmetic sequence.
An arithmetic sequence is a sequence in which the difference between consecutive terms is constant. In this case, the difference between each term is 3. For example, when n = 1, the first term is 4 * 3(1-1) = 4, and when n = 2, the second term is 4 * 3(2-1) = 12, which is 3 greater than the first term. This pattern continues for all values of n, indicating that it is an arithmetic sequence.