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 A198859 2*9^n-1. 1
 1, 17, 161, 1457, 13121, 118097, 1062881, 9565937, 86093441, 774840977, 6973568801, 62762119217, 564859072961, 5083731656657, 45753584909921, 411782264189297, 3706040377703681, 33354363399333137, 300189270593998241 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (10,-9). FORMULA a(n) = 9*a(n-1)+8. a(n) = 10*a(n-1)-9*a(n-2), n>1. G.f.: (7*x+1)/(9*x^2-10*x+1). - Harvey P. Dale, Jan 01 2013 MATHEMATICA 2*9^Range[0, 30]-1 (* or *) LinearRecurrence[{10, -9}, {1, 17}, 30] (* Harvey P. Dale, Jan 01 2013 *) PROG (Magma) [2*9^n-1: n in [0..20]] CROSSREFS Sequence in context: A125380 A126538 A164746 * A160295 A125645 A068518 Adjacent sequences: A198856 A198857 A198858 * A198860 A198861 A198862 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 01 2011 STATUS approved

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Last modified March 30 21:40 EDT 2023. Contains 361623 sequences. (Running on oeis4.)