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

Terms

a(0) =1a(1) =-1a(2) =-8a(3) =-19a(4) =-21a(5) =139a(6) =448a(7) =1414a(8) =1206a(9) =-3865a(10) =-21271a(11) =-65257a(12) =-116480a(13) =-76230a(14) =494952a(15) =2082603a(16) =5801391a(17) =10117600a(18) =8498261a(19) =-25314504a(20) =-144955267a(21) =-405982721a(22) =-858529330a(23) =-1081275709a(24) =126891854a(25) =6202698189a(26) =22569319856a(27) =56419872881a(28) =102176753056