Using techniques due to Coster, we prove a supercongruence for a generalization of the Domb numbers. This extends a recent result of Chan, Cooper and Sica and confirms a~conjectural supercongruence for numbers which are coefficients in one of Zagier's seven ``sporadic'' solutions to second order Apéry-like differential equations.
"A supercongruence for generalized Domb numbers." Funct. Approx. Comment. Math. 48 (1) 29 - 36, March 2013. https://doi.org/10.7169/facm/2013.48.1.3