|
|
|
|
5, 53, 485, 4373, 39365, 354293, 3188645, 28697813, 258280325, 2324522933, 20920706405, 188286357653, 1694577218885, 15251194969973, 137260754729765, 1235346792567893, 11118121133111045, 100063090197999413, 900567811781994725
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 9*a(n-1)+8. a(n) = 10*a(n-1)-9*a(n-2), n>1.
G.f.: (3*x+5)/(9*x^2-10*x+1) [From Harvey P. Dale, Nov 16 2011]
|
|
MATHEMATICA
|
6*9^Range[0, 20]-1 (* or *) LinearRecurrence[{10, -9}, {5, 53}, 25] (* Harvey P. Dale, Nov 16 2011 *)
|
|
PROG
|
(Magma) [6*9^n-1: n in [0..20]]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|