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

Terms

a(0) =1a(1) =-1a(2) =-3a(3) =-6a(4) =0a(5) =11a(6) =42a(7) =63a(8) =73a(9) =-45a(10) =-267a(11) =-720a(12) =-1095a(13) =-1239a(14) =-66a(15) =2794a(16) =8757a(17) =16017a(18) =22885a(19) =19634a(20) =-2359a(21) =-61979a(22) =-161867a(23) =-302190a(24) =-421971a(25) =-432051a(26) =-126712a(27) =690578a(28) =2278273a(29) =4584989