What is the next pattern in 1 5 3 15 13?

The given sequence is 1, 5, 3, 15, 13. A potential pattern is that each odd-indexed term (1st, 3rd, 5th) is increasing by 2, while the even-indexed terms (2nd, 4th) are multiplied by 3. Continuing this pattern, the next term after 13 (the 5th term) would be 39 (13 multiplied by 3). Thus, the next number in the sequence should be 39.