Expansion of ( Sum_{n = -infinity..infinity} x^(n^2) )^(-8).

Terms

a(0) =1a(1) =-16a(2) =144a(3) =-960a(4) =5264a(5) =-25056a(6) =106944a(7) =-418176a(8) =1520784a(9) =-5201232a(10) =16871648a(11) =-52252992a(12) =155341248a(13) =-445226848a(14) =1234726272a(15) =-3323392128a(16) =8704504976a(17) =-22234655520a(18) =55498917840a(19) =-135595345600a(20) =324759439584