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

Terms

a(0) =1a(1) =5a(2) =20a(3) =78a(4) =307a(5) =1219a(6) =4862a(7) =19428a(8) =77685a(9) =310705a(10) =1242776a(11) =4971050a(12) =19884135a(13) =79536463a(14) =318145762a(15) =1272582944a(16) =5090331657a(17) =20361326493a(18) =81445305820a(19) =325781223110