OFFSET
0,2
FORMULA
Conjectures from Colin Barker, Jan 29 2016: (Start)
a(n) = a(n-1)+a(n-4)-a(n-5) for n>5.
G.f.: (1+3*x-2*x^2+3*x^3-6*x^4+2*x^5) / ((1-x)^2*(1+x)*(1+x^2)).
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 17 2016
STATUS
approved