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

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =1a(5) =-2a(6) =5a(7) =-12a(8) =28a(9) =-63a(10) =137a(11) =-290a(12) =604a(13) =-1253a(14) =2617a(15) =-5537a(16) =11870a(17) =-25666a(18) =55617a(19) =-120103a(20) =257582a(21) =-548119a(22) =1158437a(23) =-2437114a(24) =5117165a(25) =-10748530a(26) =22621055a(27) =-47728657a(28) =100932549a(29) =-213750621