Given any number it is easy to find a rule based on a polynomial of order 4 such that the first four numbers are as listed in the question and the fifth is the given number. That is, it is easy to find a rule so that any number can be the "next" in the sequence.
The simplest rule, based on a polynomial of order 3, is
Un = (323n3 - 1959n2 + 3778n - 2136)/6 for n = 1, 2, 3, ...
and, accordingly, U5 = 1359.
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385
1x2=2 2x4=8 8x6=48 48x8=384 so x2 then x4 then x6 then x8
160% of 384 is 614.4
384 is an integer so there is no sensible way of representing it as a mixed number.
It is: 384 minus 25 = 359