OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (4,0,-1,-2).
FORMULA
G.f.: (1-x)^(-1)/(1-3*x-3*x^2-2*x^3).
a(n) = 4*a(n-1) - a(n-3) - 2*a(n-4). - Wesley Ivan Hurt, Jan 20 2024
MATHEMATICA
CoefficientList[Series[(1 - x)^(-1)/(1 - 3*x - 3*x^2 - 2*x^3), {x, 0, 30}], x] (* Wesley Ivan Hurt, Jan 20 2024 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved