Journal of Integer Sequences, Vol. 26 (2023), Article 23.9.6

Binomial Fibonacci Sums from Chebyshev Polynomials

Kunle Adegoke
Department of Physics and Engineering Physics
Obafemi Awolowo University
220005 Ile-Ife

Robert Frontczak

Taras Goy
Faculty of Mathematics and Computer Science
Vasyl Stefanyk Precarpathian National University
Shevchenka Str. 57
76018 Ivano-Frankivsk


We explore new types of binomial sums with Fibonacci and Lucas numbers. The binomial coefficients under consideration are $\frac{n}{n+k}\binom{n+k}{n-k}$ and $\frac{k}{n+k}\binom{n+k}{n-k}$. We derive the identities by relating the underlying sums to Chebyshev polynomials. Finally, we study some combinatorial sums and derive a connection with a recent paper by Chu and Guo from 2022.

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(Concerned with sequences A000032 A000045 A138573.)

Received August 5 2023; revised version received December 5 2023. Published in Journal of Integer Sequences, December 11 2023.

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