On Diophantine triples of Pell numbers
Tom 156 / 2019
Colloquium Mathematicum 156 (2019), 273-285
MSC: 11D09, 11D45, 11B37, 11J86.
DOI: 10.4064/cm7387-7-2018
Opublikowany online: 1 February 2019
Streszczenie
Let be the mth Pell number. We prove that if 2P_{2n}P_k+1 and 2P_{2n+2}P_k+1 are both perfect squares, then k=2n or k=2n+2 for n\geq 1.