OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (6,-5).
FORMULA
a(n) = 5*a(n-1)-2.
a(n) = 6*a(n-1)-5*a(n-2).
G.f.: (4-6*x)/((1-x)*(1-5*x)).
MATHEMATICA
(7*5^Range[0, 30]+1)/2 (* or *) LinearRecurrence[{6, -5}, {4, 18}, 30] (* Harvey P. Dale, Apr 03 2016 *)
PROG
(Magma) [(7*5^n+1)/2: n in [0..30]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 05 2011
STATUS
approved