1. Some combinatorial identities containing central binomial coefficients or Catalan numbers
- Author
-
Feng Qi, Da-Wei Niu, and Dongkyu Lim
- Subjects
catalan number ,arcsine ,square ,cubic ,ratio ,product ,sum formula ,central binomial coefficient ,finite sum ,maclaurin's expansion ,Mathematics ,QA1-939 ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
In the article, by virtue of Maclaurin's expansions of the arcsine function and its square and cubic, the authors give a short proof of a sum formula of a Maclaurin's series with coefficients containing reciprocals of the Catalan numbers; establish four sum formulas for finite sums containing the ratio or product of two central binomial coefficients or the Catalan numbers. The instant proof simplifies discussions in the journal papers: College Math. J. 43 (2012), no. 2, 141–146; Amer. Math. Monthly 121 (2014), no. 3, 267–267; Amer. Math. Monthly 123 (2016), no. 4, 405–406; Elem. Math. 71 (2016), no. 3, 109–121; and Mathematics 5 (2017), no. 3, Article 40, 31 pages.
- Published
- 2023
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