login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198963 6*9^n-1. 1
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
Sequence in context: A173879 A058390 A221236 * A293082 A069592 A350995
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 01 2011
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 13:19 EDT 2024. Contains 371254 sequences. (Running on oeis4.)