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6, 46, 406, 3646, 32806, 295246, 2657206, 23914846, 215233606, 1937102446, 17433922006, 156905298046, 1412147682406, 12709329141646, 114383962274806, 1029455660473246, 9265100944259206, 83385908498332846, 750473176484995606
(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.: 2*(3-7*x)/((1-x)*(1-9*x)).
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MAPLE
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MATHEMATICA
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PROG
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(Magma) [5*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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