Following up on results of Aigner, we present some inequalities for Motzkin numbers M-n. In particular, we prove that the sequence (1/M-n)(n >= 1) is strictly convex.
机构:
Univ Santiago de Compostela, Fac Math, Dept Math Anal, Santiago De Compostela 15782, SpainUniv Santiago de Compostela, Fac Math, Dept Math Anal, Santiago De Compostela 15782, Spain