In this paper, some identities between the Catalan, Motzkin and Schroder numbers are obtained by using the Riordan group. We also present two combinatorial proofs for an identity related to the Catalan numbers with the Motzkin numbers and an identity related to the Schroder numbers with the Motzkin numbers, respectively. (C) 2007 Elsevier B.V. All rights reserved.
机构:
Northeastern Univ Qinhuangdao, Sch Math & Stat, Qinhuangdao 066004, Hebei, Peoples R ChinaNortheastern Univ Qinhuangdao, Sch Math & Stat, Qinhuangdao 066004, Hebei, Peoples R China
Zhou, Roberta R.
Chu, Wenchang
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机构:
Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, POB 193, I-73100 Lecce, ItalyNortheastern Univ Qinhuangdao, Sch Math & Stat, Qinhuangdao 066004, Hebei, Peoples R China
机构:
Huaiyin Normal Univ, Sch Math Sci, Huaian 223300, Jiangsu, Peoples R ChinaHuaiyin Normal Univ, Sch Math Sci, Huaian 223300, Jiangsu, Peoples R China