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

Terms

a(0) =1a(1) =-2a(2) =0a(3) =3a(4) =-1a(5) =-5a(6) =4a(7) =7a(8) =-10a(9) =-8a(10) =21a(11) =5a(12) =-39a(13) =8a(14) =65a(15) =-42a(16) =-96a(17) =115a(18) =119a(19) =-253a(20) =-100a(21) =487a(22) =-34a(23) =-840a(24) =421a(25) =1293a(26) =-1295a(27) =-1712a(28) =3009a(29) =1710