OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
D. Ford, J. McKay and S. P. Norton, More on replicable functions, Comm. Algebra 22, No. 13, 5175-5193 (1994).
EXAMPLE
T16e = 1/q + 2*q - 2*q^3 + 4*q^5 + 3*q^7 + 2*q^9 - 6*q^11 + 4*q^13 + ...
MATHEMATICA
eta[q_]:= q^(1/24)*QPochhammer[q]; nmax = 100; e4D := q^(1/2)*(eta[q]/eta[q^2])^12; T4B := e4D + 64*q/e4D; T8C := (((e4D + 64*q/e4D) /. {q -> q^4}) + O[q]^nmax)^(1/2); a:= CoefficientList[Series[(1 + 4*q + ((T8C - 1) // Normal /. {q -> q^4}) + O[q]^nmax)^(1/2), {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jun 20 2018 *)
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 27 2000
STATUS
approved