Expansion of phi(-q^2) / phi(-q^3) in powers of q where phi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =0a(2) =-2a(3) =2a(4) =0a(5) =-4a(6) =4a(7) =0a(8) =-6a(9) =8a(10) =0a(11) =-12a(12) =14a(13) =0a(14) =-20a(15) =24a(16) =0a(17) =-32a(18) =38a(19) =0a(20) =-52a(21) =60a(22) =0a(23) =-80a(24) =92a(25) =0a(26) =-120a(27) =138a(28) =0a(29) =-180