# Figure-It-Out Function! - Part 2: Semi- A.P.

Algebra Level 3

A function $$f:\mathbb{Z}\rightarrow\mathbb{Z}$$, such that $$f(n)=f(n-1)+f(n+1)$$, with $$f(1)=2$$, and $$f(2)=1$$. Find $$f(2015)$$

This problem is part of the Figure-It-Out Function! series

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