Third column of Lucas bisection triangle (odd part).

Terms

a(0) =9a(1) =120a(2) =753a(3) =3612a(4) =15040a(5) =57366a(6) =206115a(7) =709152a(8) =2360943a(9) =7659870a(10) =24340184a(11) =76031100a(12) =234116493a(13) =712166952a(14) =2143779645a(15) =6394719216a(16) =18923041360a(17) =55601888562a(18) =162350117703a(19) =471371537040