The combinatorial structure of trigonometry.
The complete polynomial grid
The cyclotomic identity and the cyclic group.
The enumeration of sequences with restrictions on their partial sums.
The Euler series transformation and the binomial identities of Ljunggren, Munarini and Simons.
The (Euler)-Catalan numbers.
The factorial representations of integers and the Eratosthenes sieve
The generating function of ternary trees and continued fractions.
The Kazandzidis supercongruences. A simple proof and an application
The last digit of and .
The major counting of nonintersecting lattice paths and generating functions for tableaux. (Summary).
The Markov-WZ method.
The number of binomial coefficients in residue classes modulo p and .
The number of inversions in permutations: A saddle point approach.
The number of prime factors of binomial coefficients
The Number-System of Algebra [Book]
The power of a prime that divides a generalized binomial coefficient.
The problem of kings.
The problem of the kings.
The Pythagorean Approach to Problems of Periodicity in Chemistry and Nuclear Physics