Floor of the expected value of number of trials until exactly four cells are empty in a random distribution of n balls in n cells.

A210115

Floor of the expected value of number of trials until exactly four cells are empty in a random distribution of n balls in n cells.

Terms

    a(0) =625a(1) =50a(2) =13a(3) =5a(4) =3a(5) =2a(6) =2a(7) =2a(8) =3a(9) =4a(10) =5a(11) =7a(12) =11a(13) =17a(14) =28a(15) =46a(16) =78a(17) =136a(18) =242a(19) =441a(20) =815a(21) =1533a(22) =2927a(23) =5669a(24) =11123a(25) =22090a(26) =44363a(27) =90027a(28) =184482a(29) =381499

External references