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

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-2a(4) =-3a(5) =-4a(6) =-5a(7) =-6a(8) =-6a(9) =-1a(10) =19a(11) =74a(12) =200a(13) =461a(14) =977a(15) =1987a(16) =3976a(17) =7902a(18) =15559a(19) =30105a(20) =56778a(21) =103833a(22) =183765a(23) =314882a(24) =523007a(25) =841752a(26) =1305431a(27) =1916607a(28) =2540433a(29) =2609983