Array read by antidiagonals: T(n,k) = number of barred preferential arrangements of k things with n bars (k >=0, n >= 0).
A226513
Array read by antidiagonals: T(n,k) = number of barred preferential arrangements of k things with n bars (k >=0, n >= 0).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =3a(8) =8a(9) =13a(10) =1a(11) =4a(12) =15a(13) =44a(14) =75a(15) =1a(16) =5a(17) =24a(18) =99a(19) =308a(20) =541a(21) =1a(22) =6a(23) =35a(24) =184a(25) =807a(26) =2612a(27) =4683a(28) =1a(29) =7
External references
- oeis: A226513