Triangle T(n, k) read by rows. T(n, k) is the number of lists of k unlabeled permutations whose total length is n.
A090238
Triangle T(n, k) read by rows. T(n, k) is the number of lists of k unlabeled permutations whose total length is n.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =6a(8) =4a(9) =1a(10) =0a(11) =24a(12) =16a(13) =6a(14) =1a(15) =0a(16) =120a(17) =72a(18) =30a(19) =8a(20) =1a(21) =0a(22) =720a(23) =372a(24) =152a(25) =48a(26) =10a(27) =1a(28) =0a(29) =5040
External references
- oeis: A090238