Numerators in expansion of (1-x)^(-2/3).

Terms

a(0) =1a(1) =2a(2) =5a(3) =40a(4) =110a(5) =308a(6) =2618a(7) =7480a(8) =21505a(9) =559130a(10) =1621477a(11) =4717024a(12) =41273960a(13) =120646960a(14) =353323240a(15) =3109244512a(16) =9133405754a(17) =26862958100a(18) =711868389650