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

Terms

a(0) =1a(1) =-3a(2) =6a(3) =-12a(4) =24a(5) =-45a(6) =78a(7) =-132a(8) =222a(9) =-363a(10) =576a(11) =-900a(12) =1392a(13) =-2121a(14) =3180a(15) =-4716a(16) =6936a(17) =-10098a(18) =14550a(19) =-20796a(20) =29520a(21) =-41595a(22) =58176a(23) =-80856a(24) =111750a(25) =-153561a(26) =209820a(27) =-285240a(28) =385968a(29) =-519840