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

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =7a(8) =12a(9) =19a(10) =31a(11) =50a(12) =80a(13) =130a(14) =211a(15) =341a(16) =552a(17) =893a(18) =1444a(19) =2337a(20) =3782a(21) =6119a(22) =9901a(23) =16020a(24) =25920a(25) =41940a(26) =67861a(27) =109801a(28) =177662a(29) =287463