Expansion of (Sum_{n=-inf..inf} x^(n^2))^(-14).

Terms

a(0) =1a(1) =-28a(2) =420a(3) =-4480a(4) =38052a(5) =-273336a(6) =1723008a(7) =-9770240a(8) =50722980a(9) =-244273820a(10) =1102294984a(11) =-4698110592a(12) =19034512000a(13) =-73696070840a(14) =273868321536a(15) =-980502270720