Expansion of (1-x)*(1+x)/(1-x-2*x^2+x^4).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =7a(5) =14a(6) =26a(7) =50a(8) =95a(9) =181a(10) =345a(11) =657a(12) =1252a(13) =2385a(14) =4544a(15) =8657a(16) =16493a(17) =31422a(18) =59864a(19) =114051a(20) =217286a(21) =413966a(22) =788674a(23) =1502555a(24) =2862617a(25) =5453761a(26) =10390321a(27) =19795288a(28) =37713313a(29) =71850128