Expansion of phi(-q) / phi(-q^5) in powers of q where phi() is a Ramanujan theta function.

Terms

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