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A199689 8*10^n+1 1
9, 81, 801, 8001, 80001, 800001, 8000001, 80000001, 800000001, 8000000001, 80000000001, 800000000001, 8000000000001, 80000000000001, 800000000000001, 8000000000000001, 80000000000000001, 800000000000000001, 8000000000000000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

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

FORMULA

a(n) = 9*A059482(n).

a(n) = 10*a(n-1)-9.

a(n) = 11*a(n-1)-10*a(n-2).

G.f.: 9*(1-2*x)/((1-x)*(1-10*x)).

PROG

(MAGMA) [8*10^n+1: n in [0..30]];

CROSSREFS

Sequence in context: A144821 A344253 A338727 * A181581 A137062 A001514

Adjacent sequences:  A199686 A199687 A199688 * A199690 A199691 A199692

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 09 2011

STATUS

approved

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Last modified October 16 19:46 EDT 2021. Contains 348044 sequences. (Running on oeis4.)