Expansion of 1/(1 - 9*x/(1-x))^(2/3).

Terms

a(0) =1a(1) =6a(2) =51a(3) =456a(4) =4191a(5) =39174a(6) =370329a(7) =3529284a(8) =33838854a(9) =325978044a(10) =3152058630a(11) =30572797920a(12) =297294956070