The number of ways of putting n labeled items into k labeled boxes so that each box receives at least 2 objects.

A200091

The number of ways of putting n labeled items into k labeled boxes so that each box receives at least 2 objects.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =6a(4) =1a(5) =20a(6) =1a(7) =50a(8) =90a(9) =1a(10) =112a(11) =630a(12) =1a(13) =238a(14) =2940a(15) =2520a(16) =1a(17) =492a(18) =11508a(19) =30240a(20) =1a(21) =1002a(22) =40950a(23) =226800a(24) =113400a(25) =1a(26) =2024a(27) =137610a(28) =1367520a(29) =2079000

External references