OFFSET
0,3
LINKS
E. Angelini, k-chunks sum and division by k, post to the SeqFan list, Mar 22 2013
FORMULA
a(n) = 2 a(n-3) - a(n-6).
G.f.: x*(1 + 2*x + 3*x^2 + 2*x^3 + 4*x^4)/((1-x)*(1+x+x^2))^2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric Angelini and M. F. Hasler, Mar 23 2013
STATUS
approved