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A177107 3*(10^n-7). 0
9, 279, 2979, 29979, 299979, 2999979, 29999979, 299999979, 2999999979, 29999999979, 299999999979, 2999999999979, 29999999999979, 299999999999979, 2999999999999979, 29999999999999979, 299999999999999979 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

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

FORMULA

G.f 9*x*(1+20*x) / ( (10*x-1)*(x-1) ). a(n) = 9*A033175(n-1). - R. J. Mathar, Jan 06 2011

CROSSREFS

Sequence in context: A197768 A119408 A295898 * A012234 A012141 A328123

Adjacent sequences:  A177104 A177105 A177106 * A177108 A177109 A177110

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 15 2010

STATUS

approved

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Last modified October 17 04:09 EDT 2019. Contains 328106 sequences. (Running on oeis4.)