Expansion of Product_{k>=1} theta_4(x^k), where theta_4() is the Jacobi theta function.

Terms

a(0) =1a(1) =-2a(2) =-2a(3) =2a(4) =4a(5) =6a(6) =-6a(7) =-2a(8) =-8a(9) =-12a(10) =2a(11) =6a(12) =20a(13) =14a(14) =22a(15) =-2a(16) =-14a(17) =-34a(18) =-20a(19) =-42a(20) =-48a(21) =34a(22) =10a(23) =50a(24) =48a(25) =80a(26) =82a(27) =52a(28) =-16a(29) =-30