Expansion of (1-z-sqrt(1-4z))/(1-4z)^2.

Terms

a(0) =1a(1) =10a(2) =68a(3) =394a(4) =2092a(5) =10516a(6) =50920a(7) =239962a(8) =1107836a(9) =5033020a(10) =22572376a(11) =100168260a(12) =440604088a(13) =1923626344a(14) =8344694224a(15) =35998921978a(16) =154546983580a(17) =660652406572