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A175602 8*(10^n-3). 1
56, 776, 7976, 79976, 799976, 7999976, 79999976, 799999976, 7999999976, 79999999976, 799999999976, 7999999999976, 79999999999976, 799999999999976, 7999999999999976, 79999999999999976, 799999999999999976 (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*(7 + 20*x)/((1 - x)*(1 - 10*x)). - Vincenzo Librandi, Aug 23 2014

a(n) = 11*a(n-1) - 10*a(n-2). - Vincenzo Librandi, Aug 23 2014

MATHEMATICA

Table[8 (10^n - 3), {n, 20}] (* or *) CoefficientList[Series[8 (7 + 20 x)/((1 - x) (1 - 10 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Aug 23 2014 *)

LinearRecurrence[{11, -10}, {56, 776}, 20] (* Harvey P. Dale, Sep 26 2018 *)

PROG

(Magma) [8*(10^n-3): n in [1..20]]; // Vincenzo Librandi, Aug 23 2014

CROSSREFS

Sequence in context: A201098 A190419 A105940 * A227059 A285155 A278197

Adjacent sequences:  A175599 A175600 A175601 * A175603 A175604 A175605

KEYWORD

nonn

AUTHOR

Vincenzo Librandi

STATUS

approved

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Last modified November 26 04:47 EST 2022. Contains 358353 sequences. (Running on oeis4.)