Congruences Among Power Series Coefficients of Modular Forms

Many authors have investigated the congruence relations amongst the coefficients of power series expansions of modular forms $f$ in modular functions $t$. In a recent paper, R. Osburn and B. Sahu examine several power series expansions and prove that the coefficients exhibit congruence relations similar to the congruences satisfied by the Apéry numbers associated with the irrationality of $ζ(3)$. We show that many of the examples of Osburn and Sahu are members of infinite families.

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