Square array read by descending antidiagonals of number of ways of dividing n*k labeled items into k unlabeled orders with n items in each order.
A066991
Square array read by descending antidiagonals of number of ways of dividing n*k labeled items into k unlabeled orders with n items in each order.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =12a(5) =6a(6) =1a(7) =120a(8) =360a(9) =24a(10) =1a(11) =1680a(12) =60480a(13) =20160a(14) =120a(15) =1a(16) =30240a(17) =19958400a(18) =79833600a(19) =1814400a(20) =720a(21) =1a(22) =665280a(23) =10897286400a(24) =871782912000a(25) =217945728000a(26) =239500800a(27) =5040a(28) =1a(29) =17297280
External references
- oeis: A066991