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