1988 AIME Problems/Problem 2

Problem

We see that $f(11)=4$ $f(4)=16$ $f(16)=49$ $f(49)=169$ $f(169)=256$ $f(256)=169$ Note that this revolves between the two numbers. $f_{1984}(169)=169$

1988 AIME (Problems • Answer Key • Resources)
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