643401

Appears in sequences

• Floor of the expected value of number of trials until exactly two cells are empty in a random distribution of n balls in n cells.at n=23A210113
• Total sum of the sizes of all blocks with maximal element 7 in all set partitions of {1,2,...,n}.at n=4A270761
• Total sum of the sizes of all blocks with minimal element 5 in all set partitions of {1,2,...,n}.at n=6A270768