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

Terms

a(0) =1a(1) =-8a(2) =32a(3) =-96a(4) =256a(5) =-624a(6) =1408a(7) =-3008a(8) =6144a(9) =-12072a(10) =22976a(11) =-42528a(12) =76800a(13) =-135728a(14) =235264a(15) =-400704a(16) =671744a(17) =-1109904a(18) =1809568a(19) =-2914272a(20) =4640256a(21) =-7310592a(22) =11404416a(23) =-17626944a(24) =27009024a(25) =-41047992a(26) =61905088a(27) =-92681664a(28) =137803776a(29) =-203554224