\BOOKMARK [1][-]{section.1}{Introduction}{} \BOOKMARK [1][-]{section.2}{Notation and recall of results}{} \BOOKMARK [1][-]{section.3}{The polynomial sequences a\(n;r\), product sequences b\(n;r\) and Riordan arrays}{} \BOOKMARK [1][-]{section.4}{a\(n;r\) and Chebyshev polynomials}{} \BOOKMARK [1][-]{section.5}{b\(n;r\) and Chebyshev polynomials}{} \BOOKMARK [1][-]{section.6}{From b\(n;r\) to a\(n;r\)}{} \BOOKMARK [1][-]{section.7}{A Chebyshev product result}{} \BOOKMARK [1][-]{section.8}{Additional Riordan array factorizations}{} \BOOKMARK [1][-]{section.9}{A left inverse}{} \BOOKMARK [1][-]{section.10}{The matrix \(1-x1-x4,x1+x2\) and its inverse}{} \BOOKMARK [1][-]{section.11}{Appendix}{} \BOOKMARK [1][-]{section.12}{Acknowledgements}{}