1. INTRODUCTION
The Fibonacci sequence has been generalized in a number of ways [1], [2] and [3].
The coupled difference equations or recurrence relations involve two sequences of
integers in which the elements of one sequence are part of the generalization of the
other, and vice versa. We can say that these are generalization of ordinary recursive
sequences and a number of results can be developed for considering two sequences
are identical. They can be considered as the complementary concept of the
intersections of linear sequences. The coupled sequences provides visual pattern of
relationship. K. T. Atanassov [4] first introduced concept of coupled Fibonacci
sequences in 1985. He was defined and studied about four different ways to generate
coupled sequences and called them 2-Fibonacci sequence or 2-F sequences. This was
new direction of generalizations of Fibonacci sequence.