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

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-3a(4) =3a(5) =-5a(6) =9a(7) =-11a(8) =19a(9) =-29a(10) =41a(11) =-67a(12) =99a(13) =-149a(14) =233a(15) =-347a(16) =531a(17) =-813a(18) =1225a(19) =-1875a(20) =2851a(21) =-4325a(22) =6601a(23) =-10027a(24) =15251a(25) =-23229a(26) =35305a(27) =-53731a(28) =81763a(29) =-124341