OFFSET
0,6
COMMENTS
eta(q) = A(q)/A(q^3), where A(q) is the g.f. for this sequence (cf. A010815).
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane and Gary W. Adamson, Feb 18 2010, Aug 14 2011.
STATUS
approved