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Acknowledgments

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Neville Robbins On Fibonacci and Lucas Numbers Which are Sums of Precisely Four Squares

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A. G. Shannon Intersections of Second-Order Linear Recursive Sequences

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Christopher D. Godsil and Reinhard Razen A Property of Fibonacci and Tribonacci Numbers

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Charles R. Wall Unitary Harmonic Numbers

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     Full text | Letter to the Editor and Response

P. G. Garcia and Steve Ligh A Generalization of Euler's Φ-Function

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C. Georghiou and A. N. Philippou Harmonic Sums and the Zeta Function

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Karel L. de Bouvère and Regina E. Lathrop Injectivity of Extended Generalized Fibonacci Sequences

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Clark Kimberling One-Free Zeckendorf Sums

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Shmuel Zaks Generalized Profile Numbers

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D. H. Lehmer and Emma Lehmer Properties of Polynomials having Fibonacci Numbers for Coefficients

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Ömer Egecioglu The Parity of the Catalan Number via Lattice Paths

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Edited by A. P. Hillman Elementary Problems and Solutions

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Edited by Raymond E. Whitney Advanced Problems and Solutions

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