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

Terms

a(0) =1a(1) =-1a(2) =-16a(3) =-65a(4) =-79a(5) =831a(6) =4789a(7) =15099a(8) =6450a(9) =-162454a(10) =-922222a(11) =-2766802a(12) =-2885883a(13) =17436735a(14) =123724783a(15) =429826690a(16) =823702295a(17) =-482288111a(18) =-11124249861a(19) =-50746426204a(20) =-140257438535a(21) =-188609543978a(22) =446818695084