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 A177097 a(n) = 6*(10^n-5). 0
 30, 570, 5970, 59970, 599970, 5999970, 59999970, 599999970, 5999999970, 59999999970, 599999999970, 5999999999970, 59999999999970, 599999999999970, 5999999999999970, 59999999999999970, 599999999999999970 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Apparently 30 times the entries of A067272. - R. J. Mathar, Aug 24 2011 LINKS Table of n, a(n) for n=1..17. Index entries for linear recurrences with constant coefficients, signature (11,-10). FORMULA G.f.: 30*x*(1+8*x) / ( (10*x-1)*(x-1) ). - R. J. Mathar, Aug 24 2011 a(1)=30, a(2)=570, a(n)=11*a(n-1)-10*a(n-2). [Harvey P. Dale, Oct 10 2011] MATHEMATICA Join[{30, 570}, FromDigits/@(Join[{5}, #, {7, 0}]&/@Table[PadLeft[{}, n, 9], {n, 20}])] (* or *) LinearRecurrence[{11, -10}, {30, 570}, 20] (* Harvey P. Dale, Oct 10 2011 *) CROSSREFS Cf. A067272. Sequence in context: A285168 A028200 A028181 * A028174 A028149 A028172 Adjacent sequences: A177094 A177095 A177096 * A177098 A177099 A177100 KEYWORD nonn,easy AUTHOR Vincenzo Librandi STATUS approved

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Last modified April 18 03:01 EDT 2024. Contains 371767 sequences. (Running on oeis4.)