Let P≥3\documentclass[12pt]{minimal}
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\begin{document}$$P\ge 3$$\end{document} be an integer and let (Un)\documentclass[12pt]{minimal}
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\begin{document}$$(U_{n})$$\end{document} and (Vn)\documentclass[12pt]{minimal}
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\begin{document}$$(V_{n})$$\end{document} denote generalized Fibonacci and Lucas sequences defined by U0=0,U1=1\documentclass[12pt]{minimal}
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\begin{document}$$U_{0}=0,U_{1}=1$$\end{document}; V0=2,V1=P,\documentclass[12pt]{minimal}
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\begin{document}$$ V_{0}=2,V_{1}=P,$$\end{document} and Un+1=PUn-Un-1\documentclass[12pt]{minimal}
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\begin{document}$$U_{n+1}=PU_{n}-U_{n-1}$$\end{document}, Vn+1=PVn-Vn-1\documentclass[12pt]{minimal}
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\begin{document}$$V_{n+1}=PV_{n}-V_{n-1}$$\end{document} for n≥1.\documentclass[12pt]{minimal}
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\begin{document}$$n\ge 1.$$\end{document} In this study, when P is odd, we solve the equation Un=wx2+1\documentclass[12pt]{minimal}
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\begin{document}$$ U_{n}=wx^{2}+1$$\end{document} for w=1,2,3,5,6,7,10.\documentclass[12pt]{minimal}
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\begin{document}$$w=1,2,3,5,6,7,10.$$\end{document} After then, we solve some Diophantine equations utilizing solutions of these equations.
