Expansion of 1/(1 - x/(1 - 4*x)^(1/2))^2.

Terms

a(0) =1a(1) =2a(2) =7a(3) =28a(4) =117a(5) =498a(6) =2139a(7) =9232a(8) =39953a(9) =173162a(10) =751103a(11) =3259132a(12) =14142973a(13) =61367542a(14) =266223083a(15) =1154592752a(16) =5005724185a(17) =21694354406a(18) =93985418399a(19) =407009142836