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 A173807 (7*10^n-43)/9 for n>0. 1
 3, 73, 773, 7773, 77773, 777773, 7777773, 77777773, 777777773, 7777777773, 77777777773, 777777777773, 7777777777773, 77777777777773, 777777777777773, 7777777777777773, 77777777777777773, 777777777777777773 (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)+43 with n>0, a(0)=-4. G.f.: x*(3+40*x)/((1-x)*(1-10*x)). - Vincenzo Librandi, Jul 05 2012 a(n) = 11*a(n-1) -10*a(n-2). - Vincenzo Librandi, Jul 05 2012 MATHEMATICA CoefficientList[Series[(3+40*x)/((1-x)*(1-10*x)), {x, 0, 30}], x] (* Vincenzo Librandi, Jul 05 2012 *) Table[FromDigits[PadLeft[{3}, n, 7]], {n, 20}] (* or *) NestList[10#+43&, 3, 20] (* Harvey P. Dale, Dec 05 2013 *) PROG (MAGMA)[(7*10^n-43)/9: n in [1..20]]; // Vincenzo Librandi, Jul 05 2012 CROSSREFS Cf. A093165. Sequence in context: A256144 A060883 A162601 * A093165 A189306 A012810 Adjacent sequences:  A173804 A173805 A173806 * A173808 A173809 A173810 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Feb 25 2010 STATUS approved

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Last modified July 19 22:14 EDT 2019. Contains 325168 sequences. (Running on oeis4.)