Expansion of q * phi(-q) * psi(q^8) / (phi(q) * phi(q^4)) in powers of q where phi(), psi() are Ramanujan theta functions.

A215349

Expansion of q * phi(-q) * psi(q^8) / (phi(q) * phi(q^4)) in powers of q where phi(), psi() are Ramanujan theta functions.

Terms

    a(0) =1a(1) =-4a(2) =8a(3) =-16a(4) =30a(5) =-48a(6) =80a(7) =-128a(8) =197a(9) =-312a(10) =472a(11) =-704a(12) =1046a(13) =-1504a(14) =2160a(15) =-3072a(16) =4306a(17) =-6036a(18) =8360a(19) =-11488a(20) =15712a(21) =-21264a(22) =28656a(23) =-38400a(24) =51127a(25) =-67864a(26) =89552a(27) =-117632a(28) =153926a(29) =-200352

External references