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

Terms

a(0) =2a(1) =6a(2) =10a(3) =15a(4) =21a(5) =29a(6) =40a(7) =56a(8) =80a(9) =117a(10) =175a(11) =267a(12) =414a(13) =650a(14) =1030a(15) =1643a(16) =2633a(17) =4233a(18) =6820a(19) =11004a(20) =17772a(21) =28721a(22) =46435a(23) =75095a(24) =121466a(25) =196494a(26) =317890a(27) =514311a(28) =832125a(29) =1346357