Robuta

https://functions.wolfram.com/Polynomials/JacobiP/06/01/08/0001/ Jacobi polynomials: Series representations (formula 05.06.06.0039) Series representations jacobi polynomials series representations formula https://pldml.icm.edu.pl/pldml/element/bwmeta1.element.bwnjournal-article-doi-10_4064-aa138-2-5?printView=true Irrationality proof of a q-extension of ζ(2) using little q-Jacobi polynomials - Acta Arithmetica -... of a jacobi polynomials acta arithmetica irrationality proof