Expansion of q * (f(q^9) / f(q))^3 in powers of q where f() is a Ramanujan theta function.

Terms

a(0) =1a(1) =-3a(2) =9a(3) =-22a(4) =51a(5) =-108a(6) =221a(7) =-429a(8) =810a(9) =-1476a(10) =2631a(11) =-4572a(12) =7802a(13) =-13056a(14) =21519a(15) =-34918a(16) =55935a(17) =-88452a(18) =138332a(19) =-213990a(20) =327852a(21) =-497592a(22) =748833a(23) =-1117692a(24) =1655719a(25) =-2434938a(26) =3556791a(27) =-5161808a(28) =7445631a(29) =-10677096