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10, 55, 325, 1945, 11665, 69985, 419905, 2519425, 15116545, 90699265, 544195585, 3265173505, 19591041025, 117546246145, 705277476865, 4231664861185, 25389989167105, 152339935002625, 914039610015745, 5484237660094465, 32905425960566785
(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) = 6*a(n-1)-5.
a(n) = 7*a(n-1)-6*a(n-2).
G.f.: 5*(2-3*x)/((1-x)*(1-6*x)).
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MATHEMATICA
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NestList[6#-5&, 10, 20] (* or *) LinearRecurrence[{7, -6}, {10, 55}, 30] (* Harvey P. Dale, Sep 28 2012 *)
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PROG
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(Magma) [9*6^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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