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3, 35, 323, 2915, 26243, 236195, 2125763, 19131875, 172186883, 1549681955, 13947137603, 125524238435, 1129718145923, 10167463313315, 91507169819843, 823564528378595, 7412080755407363, 66708726798666275, 600378541187996483
(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) = 9*a(n-1)+8. a(n) = 10*a(n-1)-9*a(n-2), n>1.
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MATHEMATICA
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CoefficientList[Series[(3 + 5 x)/(1 - 10 x + 9 x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 03 2013 *)
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PROG
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(Magma) [4*9^n-1: n in [0..20]];
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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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