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

Terms

a(0) =1a(1) =1a(2) =-2a(3) =1a(4) =2a(5) =-2a(6) =0a(7) =-5a(8) =10a(9) =1a(10) =-15a(11) =10a(12) =-1a(13) =18a(14) =-39a(15) =4a(16) =50a(17) =-24a(18) =-14a(19) =-69a(20) =165a(21) =-70a(22) =-83a(23) =-20a(24) =154a(25) =161a(26) =-550a(27) =313a(28) =55a(29) =410