Séminaire Lotharingien de Combinatoire, B31f (1993).
[Formerly: Publ. I.R.M.A. Strasbourg, 1994/021, p. 29-49.]

Maylis Delest, Jean-Philippe Dubernard and Isabelle Dutour

Polyominos parallelogrammes, coins et mots de Motzkin

Abstract. We give an equation satisfied by the generating function for parallelogram polyominoes according to the area, the width and the number of left path corners. Next, we give an explicit formula for the generating function of these polyominoes according to the area, width and the number of right and left paths corners.


The paper has been finally published under the title "Parallelogram polyominoes and corners" in J. Symbolic Comput. 20 (1995), 503-515.