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

Terms

a(0) =1a(1) =3a(2) =10a(3) =29a(4) =77a(5) =195a(6) =475a(7) =1115a(8) =2546a(9) =5706a(10) =12528a(11) =27106a(12) =57893a(13) =122299a(14) =255995a(15) =531816a(16) =1097377a(17) =2252151a(18) =4600835a(19) =9362334a(20) =18990645a(21) =38418370a(22) =77548880a(23) =156251955a(24) =314363615a(25) =631703790a(26) =1268148900a(27) =2543812090a(28) =5099469848a(29) =10217529291