BULLETIN OF THE IRANIAN MATHEMATICAL SOCIETY, cilt.42, sa.1, ss.79-89, 2016 (SCI-Expanded)
In this paper, we study the generalized order-k Jacobsthal sequences modulo m for k >= 2 and the generalized order-k Jacobsthal-Padovan sequence modulo m for k >= 3. Also, we define the generalized order-k Jacobsthal orbit of a k-generator group for k >= 2 and the generalized order-k Jacobsthal-Padovan orbit a k-generator group for k >= 3. Furthermore, we obtain the lengths of the periods of the generalized order 3 Jacobsthal orbit and the generalized order-3 Jacobsthal-Padovan orbit of the direct product D-2n x Z(2m), (n, m >= 3) and the semidirect product D-2n x(phi) Z(2m), (n, m >= 3).