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

Terms

a(0) =1a(1) =5a(2) =15a(3) =35a(4) =71a(5) =135a(6) =255a(7) =495a(8) =992a(9) =2028a(10) =4186a(11) =8710a(12) =18335a(13) =39151a(14) =84711a(15) =185079a(16) =406994a(17) =899374a(18) =1996676a(19) =4453904a(20) =9980570a(21) =22454570a(22) =50688170a(23) =114750090a(24) =260454417a(25) =592628949a(26) =1351606335a(27) =3089310115a(28) =7075157399a(29) =16233066135