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A199686 6*10^n+1. 1
7, 61, 601, 6001, 60001, 600001, 6000001, 60000001, 600000001, 6000000001, 60000000001, 600000000001, 6000000000001, 60000000000001, 600000000000001, 6000000000000001, 60000000000000001, 600000000000000001, 6000000000000000001 (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) = 10*a(n-1)-9.

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

G.f.: (7-16*x)/((1-x)*(1-10*x)).

PROG

(MAGMA) [6*10^n+1: n in [0..30]];

CROSSREFS

Sequence in context: A218473 A098659 A269731 * A113718 A177132 A077642

Adjacent sequences:  A199683 A199684 A199685 * A199687 A199688 A199689

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 09 2011

STATUS

approved

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Last modified September 28 18:42 EDT 2021. Contains 347717 sequences. (Running on oeis4.)