There are \( 2016 \) chairs in a row and two available colours, **blue** and **red**. On how many ways can we paint all chairs, so that number of **blue** chairs is **even**?

(e. g. A case in which the first two chairs are blue and other are red, is different from the case in which the last two chairs are blue and other are red)

*In solution section "inspiration" for the problem is mentioned.*

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