Pell Numbers whose Euler Function is a Pell Number

arxiv: 1508.05714 · v1 · pith:AO3Y6FEFnew · submitted 2015-08-24 · 🧮 math.NT

Bernadette Faye , Florian Luca This is my paper

classification 🧮 math.NT

keywords pelleulerfunctionnumbernumberswhoseonly

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In this paper, we show that the only Pell numbers whose Euler function is also a Pell number are $1$ and $2$.

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