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A013718
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a(n) = 13^(2*n + 1).
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4
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13, 2197, 371293, 62748517, 10604499373, 1792160394037, 302875106592253, 51185893014090757, 8650415919381337933, 1461920290375446110677, 247064529073450392704413, 41753905413413116367045797
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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) = 169*a(n-1); a(0)=13.
G.f.: 13/(1-169*x). (End)
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MAPLE
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PROG
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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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