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

A260215

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

Terms

    a(0) =1a(1) =-2a(2) =2a(3) =-4a(4) =6a(5) =-8a(6) =12a(7) =-16a(8) =22a(9) =-28a(10) =36a(11) =-48a(12) =60a(13) =-76a(14) =96a(15) =-120a(16) =150a(17) =-184a(18) =228a(19) =-280a(20) =340a(21) =-416a(22) =504a(23) =-608a(24) =732a(25) =-878a(26) =1052a(27) =-1252a(28) =1488a(29) =-1768

External references