OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
Wikipedia, Partition of a set
Index entries for linear recurrences with constant coefficients, signature (4,-2,-2,-10,11,10,-6,-7,1,2)
FORMULA
G.f.: -(2*x^9+7*x^8-6*x^6-x^5+11*x^4+x^3-3*x+1) / ((x^2+x-1) * (2*x^6 +3*x^5 -6*x^3 -3*x^2 -x+1) * (x-1)^2).
a(n) = A000110(n) for n <= 4.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, May 26 2017
STATUS
approved