OFFSET
1,2
COMMENTS
It is conjectured that only odd powers appear in this expansion.
LINKS
George E. Andrews, Atul Dixit, Daniel Schultz, and Ae Ja Yee, Overpartitions related to the mock theta function w(q), arXiv:1603.04352 [math.NT], 2016. See Y(q) p. 24.
EXAMPLE
G.f. = -q^3 -2*q^5 -3*q^7 -5*q^9 -4*q^11 -7*q^13 -9*q^15 -6*q^17 -11*q^19 ...
PROG
(PARI) lista(nn) = my(v=Vec(sum(n=1, nn, sum(m=1, nn, (-1)^m*q^(2*n*m+m)/((1+q^n)*(1-q^(2*m-1))))) + O(q^(2*nn)))); vector(#v\2, k, v[2*k-1]);
CROSSREFS
KEYWORD
sign
AUTHOR
Michel Marcus, Jan 07 2022
STATUS
approved