python

(20 marks) QUESTION 4 Functions and Lists (Sequences) Here is the definition of a sequence: The first, second, and third terms are 1. The nth term is the (n-1)th + (n-2)th term + (n-3)th term. So the 4th term is the sum of the 1",2nd, and 3rd terms, and the 5th term is the sum of 2nd, 3rd, and 4th terms etc. Thus the sequence looks like this: 1, 1, 1, 3, 5, 9, 17, 31,..... Write a function call sequence(n) that takes in an integer n and returns a list containing all of the terms in this sequence from 1 up to the term. You will need to also write a short program to call and test this function