Geodesic
Pell and Pell-Lucas numbers of the form $-2^a-3^b+5^c$
Czechoslovak Mathematical Journal, Tome 70 (2020) no. 1, pp. 281-289

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In this paper, we find all Pell and Pell-Lucas numbers written in the form $-2^a-3^b+5^c$, in nonnegative integers $a$, $b$, $c$, with $0\leq \max \{a,b\}\leq c$.
DOI : 10.21136/CMJ.2019.0265-18
Classification : 11B39, 11D61, 11J86
Keywords: Pell number; Pell-Lucas number; linear form in logarithms; continued fraction; reduction method 
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     title = {Pell and {Pell-Lucas} numbers of the form $-2^a-3^b+5^c$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {281--289},
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Qu, Yunyun; Zeng, Jiwen. Pell and Pell-Lucas numbers of the form $-2^a-3^b+5^c$. Czechoslovak Mathematical Journal, Tome 70 (2020) no. 1, pp. 281-289. doi: 10.21136/CMJ.2019.0265-18

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