Array read by antidiagonals: T(n,k) is the number of proper antichain partitions of the rectangular poset of size n X k.

A378173

Array read by antidiagonals: T(n,k) is the number of proper antichain partitions of the rectangular poset of size n X k.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =5a(8) =5a(9) =1a(10) =1a(11) =14a(12) =38a(13) =14a(14) =1a(15) =1a(16) =42a(17) =372a(18) =372a(19) =42a(20) =1a(21) =1a(22) =132a(23) =4282a(24) =14606a(25) =4282a(26) =132a(27) =1a(28) =1a(29) =429

External references