Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma_0(k)).

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =32a(5) =66a(6) =138a(7) =266a(8) =512a(9) =948a(10) =1730a(11) =3074a(12) =5408a(13) =9306a(14) =15854a(15) =26594a(16) =44150a(17) =72378a(18) =117620a(19) =189074a(20) =301516a(21) =476518a(22) =747514a(23) =1163470a(24) =1798920a(25) =2762040a(26) =4215194a(27) =6393196a(28) =9642596a(29) =14462518