OFFSET
0,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..1000
FORMULA
a(n) ~ (-1)^n * 2^(n-1) * exp(Pi*sqrt(n/3)) / (3^(5/4) * n^(3/4)).
a(n) ~ (-1)^n * 2/3 * 2^n * A000009(n).
MATHEMATICA
Table[Sum[(-1)^k * 2^k * PartitionsQ[k], {k, 0, n}], {n, 0, 30}]
CROSSREFS
KEYWORD
sign
AUTHOR
Vaclav Kotesovec, Oct 09 2017
STATUS
approved