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

Terms

a(0) =1a(1) =-1a(2) =-3a(3) =-2a(4) =1a(5) =10a(6) =13a(7) =15a(8) =-1a(9) =-30a(10) =-63a(11) =-89a(12) =-80a(13) =-14a(14) =131a(15) =304a(16) =493a(17) =561a(18) =434a(19) =-32a(20) =-836a(21) =-1895a(22) =-2960a(23) =-3583a(24) =-3240a(25) =-1338a(26) =2401a(27) =8004a(28) =14499a(29) =20494