Séminaire Lotharingien de Combinatoire, B31f (1993).
[Formerly: Publ. I.R.M.A. Strasbourg, 1994/021, p.
Maylis Delest, Jean-Philippe Dubernard and Isabelle Dutour
Polyominos parallelogrammes, coins et mots de Motzkin
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.