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Fill in the correct number in this sequence:

5 3 8 9 1 27 ?

The options are: 18, 54, 38, 14 or 13.

I can see the pattern of 3, 9, 27 but other than that I am clueless.

Source: an IQ-test.

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put on hold as off-topic by JonMark Perry, Peregrine Rook, w l, boboquack, Glorfindel 25 mins ago

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