Each term in the sequence is three times the previous term plus two, so the next term is 485.
1 (3 x 1 + 2) 5 (3 x 5 + 2) 17 (3 x 17 + 2) 53 (3 x 53 = 2) 161 (3 x 161 + 2) 485
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485
The next number is 485.
485 is not necessarily the end of the sequence, but it is the next number after those listed.
As the sequence is going up, you multiply the previous number by 3 and add 2. Therefore, the next number in the sequence is equal to 161 x 3 + 2 = 425.
It's either 485 or 477. They both work.