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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
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
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified August 21 12:48 EDT 2024. Contains 375353 sequences. (Running on oeis4.)