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

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =3a(4) =3a(5) =-8a(6) =-3a(7) =19a(8) =-2a(9) =-41a(10) =23a(11) =80a(12) =-87a(13) =-137a(14) =254a(15) =187a(16) =-645a(17) =-120a(18) =1477a(19) =-405a(20) =-3074a(21) =2287a(22) =5743a(23) =-7648a(24) =-9199a(25) =21039a(26) =10750a(27) =-51277a(28) =-461a(29) =113304