OFFSET
0,20
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,1,1).
FORMULA
PROG
(PARI) a(n) = sum(k=0, n\3, binomial(k\3, n-3*k));
(PARI) my(N=90, x='x+O('x^N)); Vec((1+x^3+x^6)/(1-x^9-x^10))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Oct 01 2024
STATUS
approved