Expansion of (1 + x)/(1 + x + 3*x^2).

Terms

a(0) =1a(1) =0a(2) =-3a(3) =3a(4) =6a(5) =-15a(6) =-3a(7) =48a(8) =-39a(9) =-105a(10) =222a(11) =93a(12) =-759a(13) =480a(14) =1797a(15) =-3237a(16) =-2154a(17) =11865a(18) =-5403a(19) =-30192a(20) =46401a(21) =44175a(22) =-183378a(23) =50853a(24) =499281a(25) =-651840a(26) =-846003a(27) =2801523a(28) =-263514a(29) =-8141055