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

Terms

a(0) =1a(1) =-2a(2) =-2a(3) =4a(4) =6a(5) =-8a(6) =-12a(7) =16a(8) =22a(9) =-30a(10) =-40a(11) =52a(12) =68a(13) =-88a(14) =-112a(15) =144a(16) =182a(17) =-228a(18) =-286a(19) =356a(20) =440a(21) =-544a(22) =-668a(23) =816a(24) =996a(25) =-1210a(26) =-1464a(27) =1768a(28) =2128a(29) =-2552