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1, 0, 80, 970, 9960, 99950, 999940, 9999930, 99999920, 999999910, 9999999900, 99999999890, 999999999880, 9999999999870, 99999999999860, 999999999999850, 9999999999999840, 99999999999999830, 999999999999999820
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = 12*a(n-1)-21*a(n-2)+10*a(n-3) for n>2.
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MATHEMATICA
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CoefficientList[Series[(1-12*x+101*x^2)/((1-10*x)*(1-x)^2), {x, 0, 40}], x] (* Vincenzo Librandi, Jul 06 2012 *)
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PROG
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(Magma) [10^n-10*n: n in [0..25]];
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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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