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

Terms

a(0) =1a(1) =2a(2) =2a(3) =12a(4) =22a(5) =124a(6) =276a(7) =1496a(8) =3686a(9) =19436a(10) =51068a(11) =263720a(12) =724860a(13) =3681880a(14) =10466920a(15) =52450992a(16) =153093254a(17) =758495564a(18) =2261603564a(19) =11096526344a(20) =33676743956a(21) =163842737928a(22) =504738342808