MathNet 2020 — Math Olympiad Vault — Part 05 Question 109

Find the 2020th term of the following sequence:
$$
1, 1, 3, 1, 3, 5, 1, 3, 5, 7, 1, 3, 5, 7, 9, 1, 3, 5, 7, 9, 11, \ldots
$$