OFFSET
0,6
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * A015128(k).
a(n) = [x^n] (1 - x)^n/theta_4(x), where theta_4() is the Jacobi theta function. - Ilya Gutkovskiy, Nov 03 2017
MATHEMATICA
Table[Sum[(-1)^(n-k)*Binomial[n, k]*Sum[PartitionsP[k-j]*PartitionsQ[j], {j, 0, k}], {k, 0, n}], {n, 0, 50}]
CROSSREFS
KEYWORD
sign
AUTHOR
Vaclav Kotesovec, Nov 01 2017
STATUS
approved