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

Terms

a(0) =1a(1) =3a(2) =6a(3) =16a(4) =33a(5) =60a(6) =118a(7) =210a(8) =354a(9) =612a(10) =1008a(11) =1608a(12) =2583a(13) =4035a(14) =6174a(15) =9448a(16) =14196a(17) =21024a(18) =31054a(19) =45282a(20) =65322a(21) =93884a(22) =133638a(23) =188640a(24) =265225a(25) =370086a(26) =512934a(27) =708136a(28) =971628a(29) =1325724