Expansion of Product_{k>=1} ((1 + 2^k*x^k)/(1 - 2^k*x^k))^(1/2^k).

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =18a(5) =38a(6) =80a(7) =158a(8) =292a(9) =630a(10) =1260a(11) =2470a(12) =4922a(13) =9706a(14) =19392a(15) =41010a(16) =78466a(17) =155494a(18) =318764a(19) =625670a(20) =1238854a(21) =2567666a(22) =5106208a(23) =10122522a(24) =20022960a(25) =40082154a(26) =80027140a(27) =163330106a(28) =324201942a(29) =643489014