G.f.: Product_{n>=1} (1 - Lucas(n)*x^n + (-1)^n*x^(2*n))^3 where Lucas(n) = A000204(n).

Terms

a(0) =1a(1) =-3a(2) =-9a(3) =20a(4) =45a(5) =0a(6) =-151a(7) =-231a(8) =0a(9) =140a(10) =1107a(11) =2052a(12) =49a(13) =-1305a(14) =0a(15) =-15004a(16) =-28260a(17) =0a(18) =17710a(19) =0a(20) =81a(21) =324040a(22) =589953a(23) =0a(24) =-375570a(25) =-1089a(26) =0a(27) =-124124a(28) =-10659705a(29) =-19764180