Osburn, RobertRobertOsburnSahu, BrundabanBrundabanSahu2016-08-232016-08-232010 Ameri2011Proceedings of the American Mathematical Societyhttp://hdl.handle.net/10197/7827We prove two congruences for the coefficients of power series expansions in t of modular forms where t is a modular function. As a result, we settle two recent conjectures of Chan, Cooper and Sica. Additionally, we provide tables of congruences for numbers which appear in similar power series expansions and in the study of integral solutions of Apery-like differential equations.enFirst published in Proceedings of the American Mathematical Society, 139(7): 2375-2381 (2011), published by the American Mathematical SocietyCoefficients of power series expansions1/PICongruencesModular formsApery numbersSeriesJournal Article13972375238110.1090/S0002-9939-2010-10771-22016-08-10https://creativecommons.org/licenses/by-nc-nd/3.0/ie/