17139600domain: NAppears in sequencesSquares of Bell numbers.at n=8A001247Bell triangle A011971 squared.at n=35A095799Number of partitions of the set {1,2,...n} having no blocks that contain both odd and even entries.at n=16A124419Triangle read by rows: number of idempotents of rank k in partition monoid P_n.at n=36A256040