Triangle T(n,k) read by rows: T(n,k) = A005867(k-1)*A002110(n)/A002110(k).

Terms

a(0) =1a(1) =3a(2) =1a(3) =15a(4) =5a(5) =2a(6) =105a(7) =35a(8) =14a(9) =8a(10) =1155a(11) =385a(12) =154a(13) =88a(14) =48a(15) =15015a(16) =5005a(17) =2002a(18) =1144a(19) =624a(20) =480a(21) =255255a(22) =85085a(23) =34034a(24) =19448a(25) =10608a(26) =8160a(27) =5760a(28) =4849845a(29) =1616615