Expansion of 1/sqrt(1 - 4*x/(1-x)^3).

Terms

a(0) =1a(1) =2a(2) =12a(3) =68a(4) =396a(5) =2358a(6) =14262a(7) =87252a(8) =538440a(9) =3345434a(10) =20899816a(11) =131154264a(12) =826135794a(13) =5220372274a(14) =33077821314a(15) =210087769632