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

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =19a(5) =39a(6) =80a(7) =163a(8) =330a(9) =666a(10) =1341a(11) =2695a(12) =5409a(13) =10846a(14) =21733a(15) =43526a(16) =87140a(17) =174409a(18) =349007a(19) =698291a(20) =1396988a(21) =2794571a(22) =5590014a(23) =11181306a(24) =22364485a(25) =44731715a(26) =89467453a(27) =178940802a(28) =357890245a(29) =715793154