Expansion of phi(q^4) / phi(q) in powers of q where phi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =-2a(2) =4a(3) =-8a(4) =16a(5) =-28a(6) =48a(7) =-80a(8) =128a(9) =-202a(10) =312a(11) =-472a(12) =704a(13) =-1036a(14) =1504a(15) =-2160a(16) =3072a(17) =-4324a(18) =6036a(19) =-8360a(20) =11488a(21) =-15680a(22) =21264a(23) =-28656a(24) =38400a(25) =-51182a(26) =67864a(27) =-89552a(28) =117632a(29) =-153836