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Omni-MATH / Determine if there exists a finite set A of positive integers satisfying the following condition: for each a∈A at least one of two numbers 2a and (a)/(3) belongs to A. · Discussion

Discussing Determine if there exists a finite set A of positive integers satisfying the following condition: for each a∈A at least one of two numbers 2a and (a)/(3) belongs to A. · Omni-MATH

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