OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (4,-3).
FORMULA
a(n) = 3*a(n-1)-2.
a(n) = 4*a(n-1)-3*a(n-2).
G.f.: (9-11*x)/((1-x)*(1-3*x)). - Bruno Berselli, Nov 03 2011
PROG
(Magma) [8*3^n+1: n in [0..30]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 03 2011
STATUS
approved