Expansion of Product_{k>=1} 1/(1 + x^k)^(k*(3*k-1)/2).

Terms

a(0) =1a(1) =-1a(2) =-4a(3) =-8a(4) =1a(5) =24a(6) =78a(7) =111a(8) =75a(9) =-249a(10) =-876a(11) =-1847a(12) =-2251a(13) =-871a(14) =5170a(15) =17052a(16) =34742a(17) =47176a(18) =34576a(19) =-44016a(20) =-224561a(21) =-530104a(22) =-875149a(23) =-1030871a(24) =-475480a(25) =1488315a(26) =5658668a(27) =12109163a(28) =19411024a(29) =22693048