We generalize some congruences which were proved by M. Apagodu and J.-C. Liu (2020) involving trinomial coefficients, and we obtain a supercongruence for trinomial coefficients which contains a congruence proved by Apagodu and Liu (2020).
"On some congruences involving trinomial coefficients." Rocky Mountain J. Math. 50 (5) 1759 - 1771, October 2020. https://doi.org/10.1216/rmj.2020.50.1759