The Riordan square of the large Schröder numbers, triangle read by rows, T(n, k) for 0 <= k <= n.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =10a(5) =4a(6) =22a(7) =46a(8) =32a(9) =8a(10) =90a(11) =214a(12) =196a(13) =88a(14) =16a(15) =394a(16) =1018a(17) =1104a(18) =672a(19) =224a(20) =32a(21) =1806a(22) =4946a(23) =6020a(24) =4448a(25) =2048a(26) =544a(27) =64a(28) =8558a(29) =24470