Journal of Integer Sequences, Vol. 28 (2025), Article 25.5.8

Super FiboCatalan Numbers and Their Lucas Analogues


Kendra Killpatrick
Natural Science Division
Pepperdine University
24255 Pacific Coast Hwy
Malibu, CA 90263
USA

Abstract:

Catalan first observed that the numbers S(m,n), now called the super Catalan numbers, are integers, but there is still no known combinatorial interpretation for them in general. Interpretations have been given for the case m = 2 and for S(m, m + s) for 0 ≤ s ≤ 4. In this paper, we define the super FiboCatalan numbers S(m,n)F and the generalized FiboCatalan numbers. In addition, we give Lucas analogues for both of these numbers and use a result of Sagan and Tirrell to prove that the Lucas analogues are polynomials with non-negative integer coefficients. This proves that the super FiboCatalan numbers and the generalized FiboCatalan numbers are integers.


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(Concerned with sequences A003150 A007054 A010048 A277202 A372949.)


Received May 2 2024; revised versions received June 20 2024; April 29 2025. Published in Journal of Integer Sequences, September 22 2025.


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