Expansion of f(x, x^2) / psi(x)^3 in powers of x where psi(), f(, ) are Ramanujan theta functions.

Terms

a(0) =1a(1) =-2a(2) =4a(3) =-10a(4) =20a(5) =-36a(6) =64a(7) =-112a(8) =189a(9) =-308a(10) =492a(11) =-778a(12) =1210a(13) =-1844a(14) =2776a(15) =-4144a(16) =6114a(17) =-8914a(18) =12884a(19) =-18484a(20) =26302a(21) =-37124a(22) =52040a(23) =-72512a(24) =100415a(25) =-138196a(26) =189160a(27) =-257648a(28) =349184a(29) =-470932