61833domain: NAppears in sequencesNumber of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.at n=11A146031Number of pairs (p,q) of partitions of n into distinct parts such that p majorizes q in the dominance order.at n=32A265506