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5, 37, 325, 2917, 26245, 236197, 2125765, 19131877, 172186885, 1549681957, 13947137605, 125524238437, 1129718145925, 10167463313317, 91507169819845, 823564528378597, 7412080755407365, 66708726798666277, 600378541187996485
(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).
G.f.: (5-13*x)/((1-x)*(1-9*x)).
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PROG
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(Magma) [4*9^n+1: 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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