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

Terms

a(0) =1a(1) =1a(2) =1a(3) =5a(4) =17a(5) =41a(6) =97a(7) =253a(8) =673a(9) =1745a(10) =4481a(11) =11573a(12) =30001a(13) =77689a(14) =200929a(15) =519725a(16) =1344833a(17) =3479969a(18) =9004033a(19) =23296357a(20) =60276817a(21) =155961545a(22) =403535969a(23) =1044107357a(24) =2701521889a(25) =6989923441a(26) =18085741441a(27) =46795063445a(28) =121077583217