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

Terms

a(0) =1a(1) =3a(2) =15a(3) =93a(4) =618a(5) =4278a(6) =30390a(7) =219810a(8) =1611105a(9) =11929395a(10) =89045079a(11) =669018837a(12) =5053759440a(13) =38350056072a(14) =292147584072