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

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =-2a(4) =1a(5) =5a(6) =4a(7) =10a(8) =6a(9) =-5a(10) =-20a(11) =-27a(12) =-37a(13) =-32a(14) =-18a(15) =23a(16) =82a(17) =128a(18) =190a(19) =185a(20) =143a(21) =43a(22) =-160a(23) =-424a(24) =-662a(25) =-968a(26) =-1058a(27) =-971a(28) =-571a(29) =238