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

Terms

a(0) =1a(1) =1a(2) =4a(3) =10a(4) =27a(5) =73a(6) =196a(7) =528a(8) =1421a(9) =3825a(10) =10296a(11) =27714a(12) =74599a(13) =200801a(14) =540504a(15) =1454896a(16) =3916201a(17) =10541393a(18) =28374684a(19) =76377258a(20) =205587683a(21) =553388489a(22) =1489577660a(23) =4009555040a(24) =10792677717a(25) =29051077025a(26) =78197931824a(27) =210488462658a(28) =566580111247