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

Terms

a(0) =-1a(1) =2a(2) =1a(3) =0a(4) =4a(5) =4a(6) =5a(7) =12a(8) =17a(9) =26a(10) =46a(11) =72a(12) =115a(13) =190a(14) =305a(15) =492a(16) =800a(17) =1292a(18) =2089a(19) =3384a(20) =5473a(21) =8854a(22) =14330a(23) =23184a(24) =37511a(25) =60698a(26) =98209a(27) =158904a(28) =257116a(29) =416020