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A175604 a(n) = 8*(10^n-7). 1
24, 744, 7944, 79944, 799944, 7999944, 79999944, 799999944, 7999999944, 79999999944, 799999999944, 7999999999944, 79999999999944, 799999999999944, 7999999999999944, 79999999999999944, 799999999999999944 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..100

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

FORMULA

G.f.: 8*x*(3 + 60*x)/((1 - x)*(1 - 10*x)). - Vincenzo Librandi, Aug 24 2014

a(n) = 11*a(n-1) - 10*a(n-2). - Vincenzo Librandi, Aug 24 2014

a(n) = 10*a(n-1) + 504. - Robert Israel, Aug 24 2014

MATHEMATICA

Table[8 (10^n - 7), {n, 20}] (* or *) CoefficientList[Series[8 (3 + 60 x)/((1 - x) (1 - 10 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Aug 24 2014 *)

PROG

(MAGMA) [8*(10^n-7): n in [1..20]]; // Vincenzo Librandi, Aug 24 2014

CROSSREFS

Sequence in context: A239815 A279659 A062528 * A283873 A269147 A269209

Adjacent sequences:  A175601 A175602 A175603 * A175605 A175606 A175607

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jun 15 2010

STATUS

approved

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Last modified November 27 07:28 EST 2021. Contains 349365 sequences. (Running on oeis4.)