Given any number it is easy to find a rule based on a polynomial of order 5 such that the first five numbers are as listed in the question and the next is the given number. There are also non-polynomial solutions.
The simplest rule, using an order 3 polynomial, is
Un = (-7n3 + 59n2 - 144n + 118)/2
and, accordingly, the next number is -1.
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4236 if the series is general numeracy
36 (each number is squared)
256It follows the pattern of :1 = 114 = 2227 = 33256 = 44...and so on
This series follows the following repetitive pattern:Subtract 4divide by 3multiply by 2Give this context, the next number would be 12.
All of the above