Revert transform of (-1 + 3x^2)/(-1 - x + 4x^2 + x^3).

Terms

a(0) =1a(1) =1a(2) =0a(3) =0a(4) =2a(5) =2a(6) =3a(7) =19a(8) =42a(9) =82a(10) =280a(11) =768a(12) =1807a(13) =5167a(14) =14713a(15) =38361a(16) =105722a(17) =299954a(18) =821480a(19) =2272736a(20) =6422244a(21) =17979356a(22) =50311418a(23) =142328594a(24) =402652059a(25) =1137986155a(26) =3232284414a(27) =9201271726a(28) =26196062383a(29) =74759129271