OFFSET
1,1
COMMENTS
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 3, 0, 0, -3, 0, 0, 1).
FORMULA
Conjecture: a(n)= +3*a(n-3) -3*a(n-6) +a(n-9). G.f.: ( 3+x+3*x^2-14*x^3-6*x^4-30*x^5-21*x^6-3*x^7-5*x^8 ) / ( (x-1)^3*(1+x+x^2)^3 ). - R. J. Mathar, Dec 02 2010
CROSSREFS
KEYWORD
sign
AUTHOR
Paul Curtz, Nov 21 2010
STATUS
approved