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12, 67, 397, 2377, 14257, 85537, 513217, 3079297, 18475777, 110854657, 665127937, 3990767617, 23944605697, 143667634177, 862005805057, 5172034830337, 31032208982017, 186193253892097, 1117159523352577, 6702957140115457, 40217742840692737
(list;
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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.: (12-17*x)/((1-x)*(1-6*x)).
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MATHEMATICA
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11*6^Range[0, 30]+1 (* or *) LinearRecurrence[{7, -6}, {12, 67}, 30] (* Harvey P. Dale, Mar 26 2012 *)
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PROG
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(Magma) [11*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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