A refinement of the formula for -ary trees and the Gould-Vandermonde's convolution.
A relation between restricted and unrestricted weighted Motzkin paths.
A relationship between the major index for tableaux and the charge statistic for permutations.
A representation of Sheffer polynomials in terms of a differential equation for their generating functions.
A representation of Sheffer polynomials in terms of a differential equation for their generating functions. (Short Communication).
A restricted random walk defined via a Fibonacci process.
A Schröder generalization of Haglund's statistic on Catalan paths.
A Sequence of Exponential Numbers
A series transformation formula and related polynomials.
A simple card guessing game revisited.
A simple proof of the Aztec diamond theorem.
A solution of Dedekind's problem on the number of isotone Boolean functions.
A special class of triangular arrays.
A study of Eulerian numbers for permutations in the alternating group.
A survey of stack-sorting disciplines.
A symbolic operator approach to power series transformation-expansion formulas.
A symmetric functions approach to Stockhausen's problem.
A topology with order, graph and an enumeration problem.
A triple lacunary generating function for Hermite polynomials.
A unified approach to the study of general and palindromic compositions.