OFFSET
0,1
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (12,-27).
FORMULA
From Colin Barker, Feb 10 2016: (Start)
a(n) = 12*a(n-1) - 27*a(n-2) for n>1.
G.f.: (2-9*x) / ((1-3*x)*(1-9*x)). (End)
PROG
(PARI) Vec((2-9*x)/((1-3*x)*(1-9*x)) + O(x^100)) \\ Colin Barker, Feb 10 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved