Triangle, T(n, k) = A008517(n+1, k+1)*A008517(n+1, n-k+1), read by rows.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =64a(5) =6a(6) =24a(7) =1276a(8) =1276a(9) =24a(10) =120a(11) =23088a(12) =107584a(13) =23088a(14) =120a(15) =720a(16) =422712a(17) =6388800a(18) =6388800a(19) =422712a(20) =720a(21) =5040a(22) =8156160a(23) =326165400a(24) =1031694400a(25) =326165400a(26) =8156160a(27) =5040a(28) =40320a(29) =168521184