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2 Cerin Z.

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Sums of products of generalized Fibonacci and Lucas numbers

Cerin Z.

Demonstratio Mathematica

2009

Vol. 42, nr 2

247-258

In this paper we obtain explicit formulae for sums of products of a fixed number of consecutive generalized Fibonacci and Lucas numbers. These formulae are related to the recent work of Belbachir and Bencherif. We eliminate all restrictions about the initial values and the form of the recurrence relation. In fact, we consider six different groups of three sums that include alternating sums and sums in which terms are multiplied by binomial coefficients and by natural numbers. The proofs are direct and use the formula for the sum of the geometric series.

Properties of odd and even terms of the Fibonacci sequence

Cerin Z.

Demonstratio Mathematica

2006

Vol. 39, nr 1

55-60

We shall improve some results on sums of squares of odd terms of the Fibonacci sequence by Rajesh and Leversha.