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

Terms

a(0) =1a(1) =-1a(2) =3a(3) =-5a(4) =11a(5) =-21a(6) =43a(7) =-85a(8) =171a(9) =-341a(10) =683a(11) =-1365a(12) =2731a(13) =-5461a(14) =10923a(15) =-21845a(16) =43691a(17) =-87381a(18) =174763a(19) =-349525a(20) =699051a(21) =-1398101a(22) =2796203a(23) =-5592405a(24) =11184811a(25) =-22369621a(26) =44739243a(27) =-89478485a(28) =178956971a(29) =-357913941