Number of chiral trees with n nodes.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =4a(7) =10a(8) =34a(9) =96a(10) =284a(11) =782a(12) =2226a(13) =6208a(14) =17560a(15) =49618a(16) =141500a(17) =405104a(18) =1168316a(19) =3386538a(20) =9875232a(21) =28939944a(22) =85235762a(23) =252159572a(24) =749160544a(25) =2234378156a(26) =6688358338a(27) =20088296030a(28) =60524845158a(29) =182893018756