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

Terms

a(0) =1a(1) =3a(2) =15a(3) =90a(4) =585a(5) =3969a(6) =27657a(7) =196290a(8) =1411965a(9) =10261485a(10) =75183147a(11) =554480316a(12) =4111617510a(13) =30628393110a(14) =229048769790