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

Terms

a(0) =1a(1) =2a(2) =0a(3) =-2a(4) =-2a(5) =0a(6) =4a(7) =4a(8) =0a(9) =-6a(10) =-8a(11) =0a(12) =10a(13) =12a(14) =0a(15) =-16a(16) =-18a(17) =0a(18) =24a(19) =28a(20) =0a(21) =-36a(22) =-40a(23) =0a(24) =52a(25) =58a(26) =0a(27) =-74a(28) =-84a(29) =0