3 papers
math.NT2026
New Congruences Involving -adic dual sequences
Yassine Otmani
Let be a sequence of integers. Its dual sequence is defined by \begin{equation*} a_n^* := \sum_{k=0}^{n} \binom{n}{k}(-1)^k a_k. \en…
math.NT2025
Some Congruences Involving Fourth Powers of Generalized Central Trinomial Coefficients
Yassine Otmani, Hacene Belbachir
Let be a prime and let . Denote by the generalized central trinomial coefficient, i.e., the coefficient of in $ (x^2 + bx +…
math.CO2020
A Strehl Version of Fourth Franel Sequence
Hacene Belbachir, Yassine Otmani
We give a combinatorial identity related to the Franel numbers involving the sum of fourth power of binomial coefficients. Furthermore, investigating in J. Mikic's proof of the fir…