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

Terms

a(0) =1a(1) =0a(2) =-2a(3) =2a(4) =2a(5) =-6a(6) =2a(7) =10a(8) =-14a(9) =-6a(10) =34a(11) =-22a(12) =-46a(13) =90a(14) =2a(15) =-182a(16) =178a(17) =186a(18) =-542a(19) =170a(20) =914a(21) =-1254a(22) =-574a(23) =3082a(24) =-1934a(25) =-4230a(26) =8098a(27) =362a(28) =-16558a(29) =15834