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2, 11, 56, 281, 1406, 7031, 35156, 175781, 878906, 4394531, 21972656, 109863281, 549316406, 2746582031, 13732910156, 68664550781, 343322753906, 1716613769531, 8583068847656, 42915344238281, 214576721191406, 1072883605957031
(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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FORMULA
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a(n) = 5*a(n-1)+1. a(n) = 6*a(n-1)-5*a(n-2), n>1.
G.f.: (2-x)/(5*x^2-6*x+1) [From Harvey P. Dale, May 07 2012]
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MATHEMATICA
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(9*5^Range[0, 30]-1)/4 (* or *) LinearRecurrence[{6, -5}, {2, 11}, 30] (* Harvey P. Dale, May 07 2012 *)
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PROG
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(Magma) [(9*5^n-1)/4: n in [0..30]]
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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