OFFSET
0,4
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,-3,0,0,0,-3,0,0,0,-1).
FORMULA
G.f.: (1+x+x^2-3*x^3-6*x^4-6*x^5-3*x^6+x^7+x^8+x^9)/(1+x^4)^3.
a(n) = -3*a(n-4) - 3*a(n-8) - a(n-12). - Wesley Ivan Hurt, Mar 17 2023
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Paul Barry, Mar 31 2011
STATUS
approved