login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198399 9^n - 9*n. 2
1, 0, 63, 702, 6525, 59004, 531387, 4782906, 43046649, 387420408, 3486784311, 31381059510, 282429536373, 2541865828212, 22876792454835, 205891132094514, 1853020188851697, 16677181699666416, 150094635296998959 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (11,-19,9).

FORMULA

a(0)=1, a(1)=0, a(2)=63, a(n) = 11*a(n-1) - 19*a(n-2) + 9*a(n-3).

G.f.: (1 - 11*x + 82*x^2)/((1 - 9*x)*(1 - x)^2). - Vincenzo Librandi, Jan 04 2013

MATHEMATICA

CoefficientList[Series[(1 - 11*x + 82*x^2)/((1 - 9*x)*(1 - x)^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 04 2013 *)

PROG

(MAGMA) [9^n-9*n: n in [0..25]];

(PARI) a(n)=9^n-9*n \\ Charles R Greathouse IV, Jul 06 2017

CROSSREFS

Cf. A005803, A107583, A107584, A107585.

Sequence in context: A090028 A152725 A086578 * A221968 A115152 A284953

Adjacent sequences:  A198396 A198397 A198398 * A198400 A198401 A198402

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 26 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 24 18:47 EDT 2019. Contains 326295 sequences. (Running on oeis4.)