Expansion of (phi(-x) / phi(-x^3))^2 in powers of x 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