673619domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of pairs (lambda,mu) of partitions lambda of n and mu of ceiling(n/2) with mu <= lambda (by diagram containment).at n=31A303852Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n+1 with mu <= lambda (by diagram containment).at n=15A303863Prime numbersat n=54590