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

Terms

a(0) =1a(1) =-3a(2) =1a(3) =9a(4) =-31a(5) =57a(6) =-47a(7) =-87a(8) =449a(9) =-999a(10) =1201a(11) =393a(12) =-5983a(13) =16377a(14) =-25199a(15) =10089a(16) =70529a(17) =-251943a(18) =473713a(19) =-413367a(20) =-654751a(21) =3617721a(22) =-8234159a(23) =10231593a(24) =2241857a(25) =-47651943a(26) =133988401a(27) =-211357431a(28) =98118689