OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
Wikipedia, Partition of a set
FORMULA
G.f.: -(x-1)*(x+1)/(x^8+3*x^7-5*x^5-5*x^4-x^3-2*x^2-x+1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Sep 16 2016
STATUS
approved