Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1 - 4*x^2 + 2*x^4).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =10a(6) =20a(7) =34a(8) =68a(9) =116a(10) =232a(11) =396a(12) =792a(13) =1352a(14) =2704a(15) =4616a(16) =9232a(17) =15760a(18) =31520a(19) =53808a(20) =107616a(21) =183712a(22) =367424a(23) =627232a(24) =1254464a(25) =2141504a(26) =4283008a(27) =7311552a(28) =14623104a(29) =24963200