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

Terms

a(0) =3a(1) =7a(2) =13a(3) =23a(4) =47a(5) =97a(6) =193a(7) =383a(8) =767a(9) =1537a(10) =3073a(11) =6143a(12) =12287a(13) =24577a(14) =49153a(15) =98303a(16) =196607a(17) =393217a(18) =786433a(19) =1572863a(20) =3145727a(21) =6291457a(22) =12582913a(23) =25165823a(24) =50331647a(25) =100663297a(26) =201326593a(27) =402653183a(28) =805306367a(29) =1610612737