Timothy Myers
(Department of Mathematics, Howard University, Washington, D.C., USA)
Some Applications of the Sequence: 1, 5, 22, 93, 386,... to Dyck Paths and Ordered Trees.
The integer sequence starting: 1, 5, 22, 93, 386,... occurs in a variety of situations involving Dyck paths, grand Dyck paths, and ordered trees. We will discuss some new and some known connections, and in particular explore the enumeration of vertices in ordered trees by height using generating functions and the 
equation.
The seminar has been cancelled.