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math.CO2021★ 2 cited
Counting Baxter Matrices
George Spahn
Donald Knuth recently introduced the notion of a Baxter matrix, generalizing Baxter permutations. We show that for fixed number of rows, , the number of Baxter matrices with …
math.CO2021
Automatic Counting of Generalized Latin Rectangles and Trapezoids
George Spahn, Doron Zeilberger
In this case study in ``fully automated enumeration'', we illustrate how to take full advantage of symbolic computation by developing (what we call) `symbolic-dynamical-programming…