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

Terms

a(0) =2a(1) =2a(2) =4a(3) =7a(4) =15a(5) =32a(6) =71a(7) =158a(8) =354a(9) =794a(10) =1783a(11) =4005a(12) =8998a(13) =20217a(14) =45426a(15) =102070a(16) =229348a(17) =515339a(18) =1157955a(19) =2601900a(20) =5846415a(21) =13136774a(22) =29518062a(23) =66326482a(24) =149034251a(25) =334876921a(26) =752461610a(27) =1690765889a(28) =3799116466a(29) =8536537210