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

Terms

a(0) =2a(1) =3a(2) =7a(3) =11a(4) =21a(5) =36a(6) =64a(7) =111a(8) =193a(9) =333a(10) =573a(11) =982a(12) =1678a(13) =2859a(14) =4859a(15) =8239a(16) =13941a(17) =23544a(18) =39692a(19) =66807a(20) =112277a(21) =188433a(22) =315837a(23) =528746a(24) =884186a(25) =1477011a(26) =2464879a(27) =4109651a(28) =6845973a(29) =11394828