Pell Numbers whose Euler Function is a Pell Number

2015/08/24 by Faye, Bernadette, Luca, Florian
#FOS: Mathematics #Number Theory (math.NT)

paper · doi:10.48550/arxiv.1508.05714

Abstract

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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