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

Terms

a(0) =1a(1) =2a(2) =5a(3) =9a(4) =16a(5) =27a(6) =45a(7) =74a(8) =121a(9) =197a(10) =320a(11) =519a(12) =841a(13) =1362a(14) =2205a(15) =3569a(16) =5776a(17) =9347a(18) =15125a(19) =24474a(20) =39601a(21) =64077a(22) =103680a(23) =167759a(24) =271441a(25) =439202a(26) =710645a(27) =1149849a(28) =1860496a(29) =3010347