Expansion of Product_{k >= 1} (1 - x^k)^6.

Terms

a(0) =1a(1) =-6a(2) =9a(3) =10a(4) =-30a(5) =0a(6) =11a(7) =42a(8) =0a(9) =-70a(10) =18a(11) =-54a(12) =49a(13) =90a(14) =0a(15) =-22a(16) =-60a(17) =0a(18) =-110a(19) =0a(20) =81a(21) =180a(22) =-78a(23) =0a(24) =130a(25) =-198a(26) =0a(27) =-182a(28) =-30a(29) =90