OFFSET
1,2
COMMENTS
FORMULA
Conjecture: a(n) = +37*a(n-3) +37*a(n-6) -a(n-9). - R. J. Mathar, Sep 21 2011
Empirical g.f.: -x^2*(x^7-x^6-42*x^4+30*x^3-12*x^2-7*x-5) / (x^9-37*x^6-37*x^3+1). - Colin Barker, Jun 04 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Sep 21 2011
STATUS
approved