OFFSET
0,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
EXAMPLE
G.f. = q^(5/8) - q^(13/8) - 2*q^(21/8) + q^(29/8) - q^(37/8) + ...
MATHEMATICA
QP:= QPochhammer; CoefficientList[Series[QP[q]*QP[q^2]*QP[q^4]*QP[q^8], {q, 0, 80}], q] (* G. C. Greubel, Dec 28 2019 *)
PROG
(PARI) my(x='x+O('x^80)); Vec(eta(x)*eta(x^2)*eta(x^4)*eta(x^8)) \\ G. C. Greubel, Dec 28 2019
CROSSREFS
KEYWORD
sign
AUTHOR
STATUS
approved