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

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =14a(5) =38a(6) =94a(7) =248a(8) =628a(9) =1638a(10) =4190a(11) =10872a(12) =27940a(13) =72316a(14) =186260a(15) =481488a(16) =1241512a(17) =3207302a(18) =8274646a(19) =21369496a(20) =55148068a(21) =142396436a(22) =367537484a(23) =948920560a(24) =2449445432a(25) =6323741404a(26) =16324167564a(27) =42143003504