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

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =18a(5) =38a(6) =72a(7) =142a(8) =260a(9) =510a(10) =940a(11) =1814a(12) =3362a(13) =6490a(14) =12112a(15) =23466a(16) =44114a(17) =85766a(18) =162516a(19) =317190a(20) =604806a(21) =1184682a(22) =2271248a(23) =4461514a(24) =8591784a(25) =16916490a(26) =32696708a(27) =64496130a(28) =125037142a(29) =247007142