Triangle read by rows: the X-transformation of the Catalan triangle A033184.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =3a(5) =1a(6) =0a(7) =14a(8) =10a(9) =1a(10) =0a(11) =84a(12) =90a(13) =21a(14) =1a(15) =0a(16) =594a(17) =825a(18) =308a(19) =36a(20) =1a(21) =0a(22) =4719a(23) =7865a(24) =4004a(25) =780a(26) =55a(27) =1a(28) =0a(29) =40898