OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (9,-8).
FORMULA
a(n) = 8*a(n-1)+7. a(n) = 9*a(n-1)-8*a(n-2) for n > 1.
G.f.: (5*x+2)/(8*x^2-9*x+1) [Harvey P. Dale, Dec 07 2011]
MATHEMATICA
3*8^Range[0, 30]-1 (* or *) LinearRecurrence[{9, -8}, {2, 23}, 30] (* Harvey P. Dale, Dec 07 2011 *)
PROG
(Magma) [3*8^n-1: n in [0..30]]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 31 2011
STATUS
approved