OFFSET
-1,7
LINKS
G. C. Greubel, Table of n, a(n) for n = -1..1000
D. Ford, J. McKay and S. P. Norton, More on replicable functions, Commun. Algebra 22, No. 13, 5175-5193 (1994).
FORMULA
Expansion of 1 + eta(q)*eta(q^11)/(eta(q^3)*eta(q^33)), in powers of q. - G. C. Greubel, Jun 19 2018
EXAMPLE
T33A = 1/q - q + q^2 - q^3 + 2*q^5 - q^6 - q^7 + 3*q^8 - 2*q^9 - 2*q^10 + ...
MATHEMATICA
eta[q_]:= q^(1/24)*QPochhammer[q]; A := (eta[q]*eta[q^11])/(eta[q^3] *eta[q^33]); a := CoefficientList[Series[1 + A, {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jun 19 2018 *)
PROG
(PARI) q='q+O('q^50); A = 1 + eta(q)*eta(q^11)/(eta(q^3)*eta(q^33))/q; Vec(A) \\ G. C. Greubel, Jun 19 2018
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 27 2000
EXTENSIONS
More terms from Michel Marcus, Feb 18 2014
STATUS
approved