On generalized Thabit numbers $(p+1)p^\mathfrak{a}-1$ in the $k$-Lucas sequence

Fuente: arXiv
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Main Authors: Batte, Herbert, Luca, Florian, Stănică, Pantelimon
Format: Preprint
Published: 2026
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_version_ 1866910068515012608
author Batte, Herbert
Luca, Florian
Stănică, Pantelimon
author_facet Batte, Herbert
Luca, Florian
Stănică, Pantelimon
contents Let $k\ge 2$ and $\{L_n^{(k)}\}_{n\geq 2-k}$ be the sequence of $k$-Lucas numbers whose first $k$ terms are $0,\ldots,0,2,1$ and each term afterwards is the sum of the preceding $k$ terms. In this paper, we solve the Diophantine equation $L_n^{(k)}=(p+1)p^\mathfrak{a}-1$, for a Mersenne or Fermat prime $p=2^{\ell}\pm 1$, and positive integers $n\ge 2$, $k\ge 2$, $\mathfrak{a}\ge 1$ and $\ell \ge 1$.
format Preprint
id arxiv_https___arxiv_org_abs_2603_22878
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle On generalized Thabit numbers $(p+1)p^\mathfrak{a}-1$ in the $k$-Lucas sequence
Batte, Herbert
Luca, Florian
Stănică, Pantelimon
Number Theory
11B39, 11D61, 11D45, 11J86
Let $k\ge 2$ and $\{L_n^{(k)}\}_{n\geq 2-k}$ be the sequence of $k$-Lucas numbers whose first $k$ terms are $0,\ldots,0,2,1$ and each term afterwards is the sum of the preceding $k$ terms. In this paper, we solve the Diophantine equation $L_n^{(k)}=(p+1)p^\mathfrak{a}-1$, for a Mersenne or Fermat prime $p=2^{\ell}\pm 1$, and positive integers $n\ge 2$, $k\ge 2$, $\mathfrak{a}\ge 1$ and $\ell \ge 1$.
title On generalized Thabit numbers $(p+1)p^\mathfrak{a}-1$ in the $k$-Lucas sequence
topic Number Theory
11B39, 11D61, 11D45, 11J86
url https://arxiv.org/abs/2603.22878