OFFSET
0,31
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..2500
D. Ford, J. McKay and S. P. Norton, More on replicable functions, Comm. Algebra 22, No. 13, 5175-5193 (1994).
FORMULA
Expansion of A + q/A, where A = q^(1/2)*(eta(q^12)*eta(q^18)/(eta(q^6)* eta(q^36))), in powers of q. - G. C. Greubel, Jul 02 2018
EXAMPLE
T72d = 1/q +q +q^11 -q^13 +q^23 +q^35 +q^47 +2*q^59 -q^61 +...
MATHEMATICA
eta[q_] := q^(1/24)*QPochhammer[q]; A:= q^(1/2)*(eta[q^12]*eta[q^18]/(eta[q^6]*eta[q^36])); a:= CoefficientList[Series[A + q/A, {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jul 02 2018 *)
PROG
(PARI) q='q+O('q^80); A = (eta(q^12)*eta(q^18)/(eta(q^6)*eta(q^36))); Vec(A + q/A) \\ G. C. Greubel, Jul 02 2018
CROSSREFS
KEYWORD
sign
AUTHOR
Michael Somos, Aug 28 2005
STATUS
approved