OFFSET
-1,3
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).
David A. Madore, Coefficients of Moonshine (McKay-Thompson) series, The Math Forum
FORMULA
Expansion of A - 2, where A = (eta(q^2)*eta(q^16))^3/( eta(q)^2*eta(q^4) *eta(q^8)*eta(q^32)^2), in powers of q. - G. C. Greubel, Jun 23 2018
a(n) ~ exp(sqrt(n/2)*Pi) / (2^(7/4) * n^(3/4)). - Vaclav Kotesovec, Jun 28 2018
EXAMPLE
T32A = 1/q + 2*q + 4*q^2 + 6*q^3 + 8*q^4 + 12*q^5 + 16*q^6 + 23*q^7 + ...
MATHEMATICA
eta[q_] := q^(1/24)*QPochhammer[q]; A := (eta[q^2]*eta[q^16])^3/( eta[q]^2*eta[q^4]*eta[q^8]*eta[q^32]^2); a:= CoefficientList[Series[ q*(-2 + A), {q, 0, 60}], q]; Table[a[[n]], {n, 1, 50}] (* G. C. Greubel, Jun 23 2018 *)
PROG
(PARI) q='q+O('q^50); A = (eta(q^2)*eta(q^16))^3/( eta(q)^2*eta(q^4) *eta(q^8)*eta(q^32)^2)/q; Vec(A - 2) \\ G. C. Greubel, Jun 23 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 27 2000
EXTENSIONS
More terms from Michel Marcus, Feb 20 2014
STATUS
approved