Séminaire Lotharingien de Combinatoire, B13i (1986), 20 p.
[Formerly: Publ. I.R.M.A. Strasbourg, 1986, 316/S-13, p. 57-76.]

Germain Kreweras

Comparaison de deux decompositions symétriques des nombres d'André

Abstract. The Entringer numbers and the Carlitz numbers are the most studied among the refinements of Andr%eacute; numbers. The goal of this article is to study and compare two refinements, both of which feature an internal symmetry.


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The main part of the results of this paper have appeared in the article "On the solutions of a matrix equation," Boll. Un. Mat. Ital. 3-A (1989), 137-145.