OFFSET
0,10
COMMENTS
Convolution inverse of the 3rd order mock theta function chi(q) (A053252).
LINKS
Eric Weisstein's World of Mathematics, Mock Theta Function
FORMULA
G.f.: 1/(Sum_{i>=0} q^(i^2)/Product_{j=1..i} (1 - q^j + q^(2*j))).
MATHEMATICA
nmax = 60; CoefficientList[Series[1/Sum[q^(i^2)/Product[1 - q^j + q^(2 j), {j, 1, i}], {i, 0, nmax}], {q, 0, nmax}], q]
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Nov 03 2017
STATUS
approved