Expansion of phi(q) * phi(-q^18) / (phi(-q^3) * phi(-q^6)) in powers of q where phi() is a Ramanujan theta function.

A139213

Expansion of phi(q) * phi(-q^18) / (phi(-q^3) * phi(-q^6)) in powers of q where phi() is a Ramanujan theta function.

Terms

    a(0) =1a(1) =2a(2) =0a(3) =2a(4) =6a(5) =0a(6) =6a(7) =16a(8) =0a(9) =14a(10) =36a(11) =0a(12) =30a(13) =76a(14) =0a(15) =60a(16) =150a(17) =0a(18) =114a(19) =280a(20) =0a(21) =208a(22) =504a(23) =0a(24) =366a(25) =878a(26) =0a(27) =626a(28) =1488a(29) =0

External references