Explain precisely why a sequence is (not) continuous and differentiable.

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Explain precisely why sequence $a_n = n $ is (not) continuous and differentiable.

I have given this problem some thought and come up with the following answer: A sequence is continuous but is not differentiable.

Continuous: Consider a function $f:\mathbb R \to \mathbb R$ given by $f(x) = x$. Now consider $f \upharpoonright \mathbb N$ This is exactly the sequence in question and it's continuous because if we restrict the domain of a continuous function ($f(x) = x$) then the resulting function is still continuous.

Not differentiable: We are only allowed to take the differential quotient in some neighborhood of a limit point of the domain of the function. Since the domain of our sequence has no limit points, it cannot be differentiable.

Do you think that my explanation is satisfactory?