Riordan array (f(x), x*f(x)) where f(x) is the g.f. of A033543.

Terms

a(0) =1a(1) =2a(2) =1a(3) =5a(4) =4a(5) =1a(6) =16a(7) =14a(8) =6a(9) =1a(10) =62a(11) =52a(12) =27a(13) =8a(14) =1a(15) =270a(16) =213a(17) =116a(18) =44a(19) =10a(20) =1a(21) =1257a(22) =948a(23) =513a(24) =216a(25) =65a(26) =12a(27) =1a(28) =6096a(29) =4470