An inverse Catalan transform of A003462.

Terms

a(0) =0a(1) =1a(2) =3a(3) =5a(4) =5a(5) =0a(6) =-14a(7) =-41a(8) =-81a(9) =-121a(10) =-121a(11) =0a(12) =364a(13) =1093a(14) =2187a(15) =3281a(16) =3281a(17) =0a(18) =-9842a(19) =-29525a(20) =-59049a(21) =-88573a(22) =-88573a(23) =0a(24) =265720a(25) =797161a(26) =1594323a(27) =2391485a(28) =2391485a(29) =0