2661473domain: NPropertiesPrimalityPrimeyesAppears in sequencesTotal sum of the sizes of all blocks with maximal element 6 in all set partitions of {1,2,...,n}.at n=6A270760Total sum of the sizes of all blocks with minimal element 7 in all set partitions of {1,2,...,n}.at n=5A270770Prime numbersat n=194046