Exploring Two New Combinatorial Identities and Their Applications to Catalan–Qi Numbers. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 19, n. 2, p. 6908, 2026. DOI: 10.29020/nybg.ejpam.v19i2.6908. Disponível em: https://www.ejpam.com/ejpam/article/view/6908. Acesso em: 28 jul. 2026.