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.: x*(3-2*x+3*x^2-4*x^3+3*x^4-x^7-x^8) / ((1-x)^2*(1+x)*(1+x^2)).
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 17 2016
STATUS
approved