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184. 
Given a positive integer , it can be shown that every complex number of the form , where and are integers, can be uniquely expressed in the base using the integers as digits. That is, the equation is true for a unique choice of nonnegative integer and digits chosen from the set , with . We write to denote the base expansion of . There are only finitely many integers that have fourdigit expansions Find the sum of all such . This problem is copyrighted by the American Mathematics Competitions.

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