Expansion of 1/(theta_3(q) * theta_3(q^2)), where theta_3() is the Jacobi theta function.

Terms

a(0) =1a(1) =-2a(2) =2a(3) =-4a(4) =10a(5) =-16a(6) =20a(7) =-32a(8) =58a(9) =-86a(10) =112a(11) =-164a(12) =260a(13) =-368a(14) =480a(15) =-672a(16) =986a(17) =-1348a(18) =1750a(19) =-2372a(20) =3312a(21) =-4416a(22) =5684a(23) =-7520a(24) =10148a(25) =-13266a(26) =16912a(27) =-21960a(28) =28896a(29) =-37168