# Coprimer 2016

Number Theory Level pending

Find the number of integers $$n$$ between $$4$$ and $$2016$$, inclusive, that cannot be expressed in form of $$n=a+b$$, where $$1<a<b$$ and both $$a$$ and $$b$$ are integers, while $$GCD(a,b)=1$$ ($$a$$ and $$b$$ are coprime).

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