“…The k−Fibonacci sequence introduced by Falcon and Plaza [3] depends only on one integer parameter k and is de ned as F k, = , F k, = and F k,n+ = kF k,n + F k,n− , where n ≥ , k ≥ . In particular, if k = , the Pell sequence is obtained as P = , P = and P n+ = Pn +P n− for n ≥ .…”