Triangle read by rows: T(n,k) = A059383(n)/(A059383(k)*A059383(n-k)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =15a(5) =1a(6) =1a(7) =80a(8) =80a(9) =1a(10) =1a(11) =240a(12) =1280a(13) =240a(14) =1a(15) =1a(16) =624a(17) =9984a(18) =9984a(19) =624a(20) =1a(21) =1a(22) =1200a(23) =49920a(24) =149760a(25) =49920a(26) =1200a(27) =1a(28) =1a(29) =2400