Expansion of (phi(q) / phi(q^9))^2 in powers of q where phi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =4a(2) =4a(3) =0a(4) =4a(5) =8a(6) =0a(7) =0a(8) =4a(9) =0a(10) =-8a(11) =-16a(12) =0a(13) =-8a(14) =-32a(15) =0a(16) =4a(17) =-8a(18) =0a(19) =16a(20) =56a(21) =0a(22) =16a(23) =96a(24) =0a(25) =-4a(26) =24a(27) =0a(28) =-32a(29) =-152