Abstract
Let \(P\ge 3\) be an integer and let \((U_{n})\) and \((V_{n})\) denote generalized Fibonacci and Lucas sequences defined by \(U_{0}=0,U_{1}=1\); \( V_{0}=2,V_{1}=P,\) and \(U_{n+1}=PU_{n}-U_{n-1}\), \(V_{n+1}=PV_{n}-V_{n-1}\) for \(n\ge 1.\) In this study, when P is odd, we solve the equation \( U_{n}=wx^{2}+1\) for \(w=1,2,3,5,6,7,10.\) After then, we solve some Diophantine equations utilizing solutions of these equations.
Similar content being viewed by others
References
D. Kalman, R. Mena, The Fibonacci numbers-exposed. Math. Mag. 76, 167–181 (2003)
J.B. Muskat, Generalized Fibonacci and Lucas sequences and rootfinding methods. Math. Comput. 61, 365–372 (1993)
S. Rabinowitz, Algorithmic manipulation of Fibonacci identities. Appl Fibonacci Number 6, 389–408 (1996)
P. Ribenboim, My Numbers, My Friends (Springer, New York, 2000)
P. Ribenboim, W.L. McDaniel, The square terms in Lucas sequences. J. Number Theory 58, 104–123 (1996)
Z. Şiar, R. Keskin, The square terms in generalized Fibonacci sequence. Mathematika 60, 85–100 (2014)
R. Keskin, O. Karaatlı, Generalized Fibonacci and Lucas numbers of the form \(5x^{2}\). Int. J. Number. Theory 11(3), 931–944 (2015)
M.A. Alekseyev, S. Tengely, On integral points on biquadratic curves and near-multiples of squares in Lucas sequences. J. Integer Seq. 17, no. 6, Article ID 14.6.6, (2014)
R. Keskin, Generalized Fibonacci and Lucas numbers of the form \(wx^{2}\) and \(wx^{2}\pm 1\). Bull. Korean Math. Soc. 51, 1041–1054 (2014)
O. Karaatlı, R. Keskin, Generalized Lucas Numbers of the form \(5kx^{2}\) and \(7kx^{2}\). Bull. Korean Math. Soc. 52(5), 1467–1480 (2015)
M.A. Bennett, S. Dahmen, M. Mignotte, S. Siksek, Shifted powers in binary recurrence sequences. Math. Proc. Camb. Philos. Soc. 158(2), 305–329 (2015)
Y. Bugeaud, F. Luca, M. Mignotte, S. Siksek, Fibonacci numbers at most one away from a perfect power. Elem. Math. 63(2), 65–75 (2008)
Y. Bugeaud, F. Luca, M. Mignotte, S. Siksek, Almost powers in the Lucas sequence. J. Théor. Nombres Bordx. 20(3), 555–600 (2008)
Y. Bugeaud, M. Mignotte, S. Siksek, Classical and modular approaches to exponential Diophantine equations. I. Fibonacci and Lucas perfect powers. Ann. Math. 163(3), 969–1018 (2006)
J.H.E. Cohn, Squares in some recurrent sequences. Pac. J. Math. 41, 631–646 (1972)
P. Ribenboim, W. L. McDaniel, On Lucas sequence terms of the form \(kx^{2},\) number theory: proceedings of the Turku symposium on Number Theory in memory of Kustaa Inkeri (Turku, 1999), de Gruyter, Berlin, 293–303 (2001)
R.T. Bumby, The Diophantine equation \(3x^{4}-2y^{2}=1\). Math. Scand. 21, 144–148 (1967)
R. Keskin and Z. Şiar, Positive integer solutions of some Diophantine equations in terms of integer sequences (submitted)
J.P. Jones, Representation of solutions of Pell equations using Lucas sequences. Acta Acad. Paedagog. Agriensis Sect. Mat. 30, 75–86 (2003)
R. Keskin, Solutions of some quadratic Diophantine equations. Comput. Math. Appl. 60, 2225–2230 (2010)
W.L. McDaniel, Diophantine representation of Lucas sequences. Fibonacci Quart. 33, 58–63 (1995)
R. Melham, Conics which characterize certain Lucas sequences. Fibonacci Quart. 35, 248–251 (1997)
Z. Şiar, R. Keskin, Some new identities concerning generalized Fibonacci and Lucas numbers. Hacet. J. Math. Stat. 42(3), 211–222 (2013)
W.L. McDaniel, The g.c.d. in Lucas sequences and Lehmer number sequences. Fibonacci Quart. 29, 24–30 (1991)
W. Bosma, J. Cannon, C. Playoust, The MAGMA algebra system. I: the user language. J. Symb. Comput. 24(3–4), 235–265 (1997)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Keskin, R., Öğüt, Ü. Generalized Fibonacci numbers of the form \(wx^{2}+1\) . Period Math Hung 73, 165–178 (2016). https://doi.org/10.1007/s10998-016-0133-4
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10998-016-0133-4