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We examine a result of Basor and Ehrhardt concerning Hankel and Toeplitz plusHankel matrices, within the context of the Riordan group of lower-triangularmatrices. This allows us to determine the LDU decomposition of certainsymmetric Toeplitz plus Hankel matrices. We also determine the generatingfunctions and Hankel transforms of associated sequences.

Riordan arrays and the LDU decomposition of symmetric Toeplitz plus Hankel matrices