CLAPPERTON, JAMES A.; LARCOMBE, PETER J; FENNESSEY, ERIC J. On iterated generating functions for integer sequences, and catalan polynomials. Utilitas Mathematica , [S. l.], v. 77, 2008. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/526. Acesso em: 8 may. 2026.