Sum Formulas for Generalized Fifth-Order Linear Recurrence Sequences
Journal of Advances in Mathematics and Computer Science · pp. 1–14 · Published 23 Dec 2019
10.9734/jamcs/2019/v34i530224Abstract
In this paper, closed forms of the summation formulas for generalized Pentanacci numbers are presented. Then, some previous results are recovered as particular cases of the present results. As special cases, we give summation formulas of Pentanacci, Pentanacci-Lucas, fifth order Pell, fifth order Pell-Lucas, fifth order Jacobsthal and fifth order Jacobsthal-Lucas sequences. We present the proofs to indicate how these formulas, in general, were discovered. In fact, all the listed formulas of the special cases of of the main theorems may be proved by induction, but that method of proof gives no clue about their discovery.
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