224527domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of (G(-x) / chi(-x))^2 in powers of x where chi() is a Ramanujan theta function and G() is a Rogers-Ramanujan function.at n=42A261866Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^9.at n=18A341251Prime numbersat n=19983