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

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =25a(5) =52a(6) =103a(7) =198a(8) =370a(9) =680a(10) =1221a(11) =2158a(12) =3757a(13) =6448a(14) =10931a(15) =18322a(16) =30382a(17) =49894a(18) =81206a(19) =131044a(20) =209818a(21) =333466a(22) =526294a(23) =825182a(24) =1285807a(25) =1991754a(26) =3068074a(27) =4700910a(28) =7166216a(29) =10871534