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On generalized balancing sequences. (English) Zbl 1211.11015

A binary recurrence sequence \(R_i=R(A,B,R_0,R_1)\) is called balancing sequence if \[ R_1+R_2+\dots+R_{n-1}=R_{n+1}+R_{n+2}+\dots+R_{n+k} \] holds for some \(k\geq 1\) and \(n\geq 2\). The authors prove that there is no balancing sequence of the form \(R_i=R(A,B,0,R_1)\) with \(A^2+4B>0\) except for \((A,B)=(0,1)\). It follows that a Lucas sequence \(R_i=R(A,B,0,1)\) with \(A^2+4B>0\) is not a balancing sequence.

MSC:

11B37 Recurrences
11B39 Fibonacci and Lucas numbers and polynomials and generalizations