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

Terms

a(0) =0a(1) =2a(2) =3a(3) =4a(4) =6a(5) =10a(6) =17a(7) =30a(8) =54a(9) =98a(10) =179a(11) =328a(12) =602a(13) =1106a(14) =2033a(15) =3738a(16) =6874a(17) =12642a(18) =23251a(19) =42764a(20) =78654a(21) =144666a(22) =266081a(23) =489398a(24) =900142a(25) =1655618a(26) =3045155a(27) =5600912a(28) =10301682a(29) =18947746