A transform of the little Schroeder numbers.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =14a(6) =35a(7) =81a(8) =208a(9) =517a(10) =1351a(11) =3492a(12) =9261a(13) =24521a(14) =65862a(15) =177247a(16) =481191a(17) =1310338a(18) =3589143a(19) =9862257a(20) =27215012a(21) =75320969a(22) =209147407a(23) =582264200a(24) =1625342649a(25) =4547350865a(26) =12750836298a(27) =35824579355a(28) =100843670951a(29) =284361285238