Expansion of Product_{n>=1} ((1 - (4*x)^n)/(1 + (4*x)^n))^(1/4).

Terms

a(0) =1a(1) =-2a(2) =-6a(3) =-28a(4) =-26a(5) =-156a(6) =-476a(7) =968a(8) =11526a(9) =-16172a(10) =139724a(11) =791928a(12) =1315548a(13) =12772840a(14) =31004424a(15) =-105335920a(16) =1058225606a(17) =2239259700a(18) =-3700870212a(19) =29301955992a(20) =-4944685836a(21) =-526686535112