OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
G.f.: Product_{i>0} (1 - 2*x^i)/(1 - x^i).
Euler transform of -A008965(n).
MATHEMATICA
CoefficientList[Series[Product[(1-2x^k)/(1-x^k), {k, 70}], {x, 0, 70}], x] (* Harvey P. Dale, Jan 21 2021 *)
PROG
(PARI) N=66; x='x+O('x^N); Vec(prod(k=1, N, 1-x^k/(1-x^k))) \\ Seiichi Manyama, Oct 05 2019
CROSSREFS
KEYWORD
sign,look
AUTHOR
Vladeta Jovovic, Apr 21 2005
EXTENSIONS
a(0)=1 prepended by Seiichi Manyama, Oct 05 2019
STATUS
approved