Triangle T(n, k) = A090443(n-1)/(A090443(k-1)*A090443(n-k-1)) read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =24a(8) =24a(9) =1a(10) =1a(11) =60a(12) =240a(13) =60a(14) =1a(15) =1a(16) =120a(17) =1200a(18) =1200a(19) =120a(20) =1a(21) =1a(22) =210a(23) =4200a(24) =10500a(25) =4200a(26) =210a(27) =1a(28) =1a(29) =336