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7, 39, 199, 999, 4999, 24999, 124999, 624999, 3124999, 15624999, 78124999, 390624999, 1953124999, 9765624999, 48828124999, 244140624999, 1220703124999, 6103515624999, 30517578124999, 152587890624999, 762939453124999
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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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 (6,-5).
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FORMULA
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a(n) = 5*a(n-1)+4.
a(n) = 6*a(n-1)-5*a(n-2), n>1.
G.f.: (7 - 3*x)/(1 - 6*x + 5*x^2). - Vincenzo Librandi, Jan 04 2013
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MATHEMATICA
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CoefficientList[Series[(7 - 3*x)/(1 - 6*x + 5*x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 04 2013 *)
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PROG
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(MAGMA) [8*5^n-1: n in [0..30]];
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CROSSREFS
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Cf. A024049, A057651, A081655.
Sequence in context: A004057 A081898 A034267 * A026752 A026379 A026708
Adjacent sequences: A198764 A198765 A198766 * A198768 A198769 A198770
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Oct 30 2011
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STATUS
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approved
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