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

Terms

a(0) =0a(1) =1a(2) =1a(3) =6a(4) =11a(5) =62a(6) =138a(7) =748a(8) =1843a(9) =9718a(10) =25534a(11) =131860a(12) =362430a(13) =1840940a(14) =5233460a(15) =26225496a(16) =76546627a(17) =379247782a(18) =1130801782a(19) =5548263172a(20) =16838371978a(21) =81921368964a(22) =252369171404