OFFSET
-1,3
LINKS
G. C. Greubel, Table of n, a(n) for n = -1..1500
D. Ford, J. McKay and S. P. Norton, More on replicable functions, Comm. Algebra 22, No. 13, 5175-5193 (1994).
FORMULA
Expansion of q^(1/2)*(eta(q)*eta(q^2)/(eta(q^5)*eta(q^10))) in powers of q. - G. C. Greubel, Jun 21 2018
EXAMPLE
T20c = 1/q - q - 2*q^3 + q^5 + 3*q^9 - 2*q^13 + q^15 - 2*q^17 + 6*q^19 - ...
MATHEMATICA
eta[q_] := q^(1/24)*QPochhammer[q]; a:= CoefficientList[Series[q^(1/2)*(eta[q]*eta[q^2]/(eta[q^5]*eta[q^10])), {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jun 21 2018 *)
PROG
(PARI) q='q+O('q^50); A = (eta(q)*eta(q^2)/(eta(q^5)*eta(q^10))); Vec(A) \\ G. C. Greubel, Jun 21 2018
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 27 2000
EXTENSIONS
Terms a(12) onward added by G. C. Greubel, Jun 21 2018
STATUS
approved