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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198698 3*10^n-1. 1
2, 29, 299, 2999, 29999, 299999, 2999999, 29999999, 299999999, 2999999999, 29999999999, 299999999999, 2999999999999, 29999999999999, 299999999999999, 2999999999999999, 29999999999999999, 299999999999999999 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (11,-10).

FORMULA

a(n) = 10*a(n-1)+9, a(0)=2. a(n) = 11*a(n-1)-10*a(n-2), n>1.

G.f. ( 2+7*x ) / ( (10*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011

PROG

(MAGMA) [3*10^n-1: n in [0..30]]

CROSSREFS

Cf. A002283, A109002.

Sequence in context: A160952 A088615 A091716 * A094940 A152274 A183722

Adjacent sequences:  A198695 A198696 A198697 * A198699 A198700 A198701

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 29 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 20 16:11 EST 2018. Contains 299380 sequences. (Running on oeis4.)