OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (4, 0, 0, -3).
FORMULA
a(0)=1, a(1)=4, a(2)=16, a(3)=64, a(n)=4*a(n-1)-3*a(n-4) [From Harvey P. Dale, May 10 2011]
MATHEMATICA
LinearRecurrence[{4, 0, 0, -3}, {1, 4, 16, 64}, 40] (* or *) CoefficientList[ Series[(1-x)^(-1)/(1-3x-3x^2-3x^3), {x, 0, 40}], x] (* Harvey P. Dale, May 10 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved