Expansion of ( 1-x ) / ( 1-4*x-x^2+2*x^3 ).

Terms

a(0) =1a(1) =3a(2) =13a(3) =53a(4) =219a(5) =903a(6) =3725a(7) =15365a(8) =63379a(9) =261431a(10) =1078373a(11) =4448165a(12) =18348171a(13) =75684103a(14) =312188253a(15) =1287740773a(16) =5311783139a(17) =21910496823a(18) =90378288885a(19) =372800086085