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

Terms

a(0) =1a(1) =-2a(2) =-4a(3) =4a(4) =8a(5) =16a(6) =-12a(7) =-28a(8) =-28a(9) =-56a(10) =64a(11) =68a(12) =152a(13) =144a(14) =-20a(15) =-72a(16) =-678a(17) =-508a(18) =-424a(19) =92a(20) =824a(21) =1512a(22) =2204a(23) =1036a(24) =936a(25) =-1900a(26) =-2936a(27) =-6444a(28) =-5656a(29) =-4384