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New posts in Catalan Numbers
Closed form for $ S(m) = \sum_{n=1}^\infty \frac{2^n \cdot n^m}{\binom{2n}n} $ for integer $m$?
Apr 30, 2021
Catalan numbers formula derivation
Apr 30, 2021
Catalan's constant and $\int_{0}^{2 \pi} \int_{0}^{2 \pi} \ln(\cos^{2} \theta + \cos^{2} \phi) ~d \theta~ d \phi$
Apr 29, 2021
Number of ways to pair off $2n$ points such that no chords intersect
Apr 29, 2021
Prove a combinatorial identity: $ \sum_{n_1+\dots+n_m=n} \prod_{i=1}^m \frac{1}{n_i}\binom{2n_i}{n_i-1}=\frac{m}{n}\binom{2n}{n-m}$
Apr 28, 2021
Generating series of Catalan numbers
Apr 27, 2021
Identity with Catalan numbers
Apr 27, 2021
How many arrangements of the digits 1,2,3, ... ,9 have this property?
Apr 26, 2021
Finding relatives of the series $\varphi =\frac{3}{2}+\sum_{k=0}^{\infty}(-1)^{k}\frac{(2k)!}{(k+1)!k!2^{4k+3}}$.
Apr 26, 2021
Simplifying Catalan number recurrence relation
Apr 25, 2021
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