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

Terms

a(0) =1a(1) =-2a(2) =3a(3) =-3a(4) =1a(5) =4a(6) =-12a(7) =21a(8) =-26a(9) =19a(10) =9a(11) =-63a(12) =136a(13) =-200a(14) =201a(15) =-66a(16) =-269a(17) =805a(18) =-1407a(19) =1740a(20) =-1268a(21) =-611a(22) =4230a(23) =-9117a(24) =13393a(25) =-13439a(26) =4368a(27) =18096a(28) =-53999a(29) =94270