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

Terms

a(0) =1a(1) =4a(2) =4a(3) =-4a(4) =-12a(5) =-8a(6) =12a(7) =32a(8) =20a(9) =-28a(10) =-72a(11) =-48a(12) =60a(13) =152a(14) =96a(15) =-120a(16) =-300a(17) =-184a(18) =228a(19) =560a(20) =344a(21) =-416a(22) =-1008a(23) =-608a(24) =732a(25) =1756a(26) =1048a(27) =-1252a(28) =-2976a(29) =-1768