Expansion of 1 / (chi(-x) * chi(-x^3)) in powers of x where chi() is a Ramanujan theta function.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =4a(6) =7a(7) =8a(8) =10a(9) =16a(10) =19a(11) =23a(12) =33a(13) =39a(14) =48a(15) =65a(16) =77a(17) =93a(18) =122a(19) =144a(20) =173a(21) =220a(22) =259a(23) =309a(24) =384a(25) =451a(26) =534a(27) =653a(28) =764a(29) =899