|Journal of Integer Sequences, Vol. 23 (2020), Article 20.6.6|
where c, m, n are positive integers such that m ≤ n. More precisely, we determine a nontrivial rational divisor of Lc,m,n and then we derive (as consequences) some non-trivial lower bounds for Lc,m,n . Our approach (focusing on commutative algebra) is new and different from those using previously by Farhi, Oon, and Hong.
Received January 30 2020; revised versions received May 8 2020; May 14 2020. Published in Journal of Integer Sequences, June 22 2020.