OFFSET
2,1
LINKS
R. P. Stanley, Problem 11348, Amer. Math. Monthly, 117 (2010), 87-88.
Index entries for linear recurrences with constant coefficients, signature (0,4,4,0,-16).
FORMULA
a(n) = 4*a(n-2)+4*a(n-3)-16*a(n-5). G.f.: -4*x^2*(x^4+4*x^3-x-1) / ((2*x-1)*(2*x+1)*(4*x^3-1)). - Colin Barker, Jul 26 2013
MATHEMATICA
LinearRecurrence[{0, 4, 4, 0, -16}, {4, 4, 16, 16, 76}, 40] (* Harvey P. Dale, Mar 11 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Dec 30 2009
STATUS
approved