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

Terms

a(0) =1a(1) =3a(2) =7a(3) =16a(4) =35a(5) =75a(6) =158a(7) =329a(8) =679a(9) =1392a(10) =2839a(11) =5767a(12) =11678a(13) =23589a(14) =47555a(15) =95720a(16) =192427a(17) =386451a(18) =775486a(19) =1555153a(20) =3117071a(21) =6245088a(22) =12507887a(23) =25044431a(24) =50135230a(25) =100345485a(26) =200812363a(27) =401821144a(28) =803960099a(29) =1608434427