Have you already understood how these sequences work? Like, what is the next term?

If not, look at the differences between consecutive terms. As you'll see, you can find a simple formula for these differences, and then infer a formula for the initial sequence.

Of course, there is more than one sequence beginning with the few terms you give, so the question is, in plain rigour, pointless, but the strategy underlined in the above paragraph provides the "simplest" sequence (simplest to define).