EMIS ELibM Electronic Journals Publications de l’Institut Mathématique, Nouvelle Série
Vol. 101[115], pp. 231–245 (2017)

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PELL NUMBERS WHOSE EULER FUNCTION IS A PELL NUMBER

Bernadette Faye, Florian Luca

School of Mathematics, University of the Witwatersrand, Wits, South Africa; Ecole Doctorale de Mathematiques et d’Informatique, Université Cheikh Anta Diop de Dakar, Dakar Fann, Senegal; Centro de Cienacias Matemáticas UNAM, Morelia, Mexico

Abstract: We show that the only Pell numbers whose Euler function is also a Pell number are 1 and 2.

Keywords: Pell numbers; Euler function

Classification (MSC2000): 11B39

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Electronic fulltext finalized on: 24 Apr 2017. This page was last modified: 11 May 2017.

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