331099domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of multisets of gapless multisets whose multiset union is a size-n multiset covering an initial interval.at n=10A356942Number of pairs (p,q) of partitions of n such that the set of parts in q is a subset of the set of parts in p.at n=27A369704Prime numbersat n=28491