Expansion of Product_{m >= 1} (1 + q^m)^(-2).

Terms

a(0) =1a(1) =-2a(2) =1a(3) =-2a(4) =4a(5) =-4a(6) =5a(7) =-6a(8) =9a(9) =-12a(10) =13a(11) =-16a(12) =21a(13) =-26a(14) =29a(15) =-36a(16) =46a(17) =-54a(18) =62a(19) =-74a(20) =90a(21) =-106a(22) =122a(23) =-142a(24) =171a(25) =-200a(26) =227a(27) =-264a(28) =311a(29) =-358