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 A173833 10^n - 3. 5
 7, 97, 997, 9997, 99997, 999997, 9999997, 99999997, 999999997, 9999999997, 99999999997, 999999999997, 9999999999997, 99999999999997, 999999999999997, 9999999999999997, 99999999999999997, 999999999999999997 (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 a(n) = 10*a(n-1)+27 with n>1, a(1)=7. G.f.: x*(20*x+7)/((x-1)*(10*x-1)). [Colin Barker, Jan 24 2013] MATHEMATICA LinearRecurrence[{11, -10}, {7, 97}, 20] (* Vincenzo Librandi, Feb 22 2012 *) PROG (PARI) a(n)=10^n-3 \\ Charles R Greathouse IV, Jan 11 2012 CROSSREFS Sequence in context: A068694 A158579 A003618 * A093172 A074110 A155644 Adjacent sequences: A173830 A173831 A173832 * A173834 A173835 A173836 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Feb 26 2010 STATUS approved

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Last modified August 6 03:16 EDT 2024. Contains 374957 sequences. (Running on oeis4.)