perplexus.info :: Just Math : Interesting Function (2)

Interesting Function (2) (Posted on 2004-09-03)

Given: f is a function with domain and range of the positive integers, and f satisfies these two conditions:

(1) f(n+1) > f(n); that is, f is strictly increasing, and

(2) f(f(n)) = 3n

Find all possible values of f(955)

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