Is this the right number pattern

[From: ] [author: ] [Date: 12-11-19] [Hit: ]

1503, 5697, 21600? i thought it was add both and multiply it by 2, for example, 1 plus 8 = 9 *3 = 27.......

1, 8, 27, 105, 396, 1503, 5697, 21600? i thought it was add both and multiply it by 2, for example, 1 plus 8 = 9 *3 = 27. Is this right?

You are absolutely correct.

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