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A074555
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a(n) = 3^n + 6^n + 7^n.
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1
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3, 16, 94, 586, 3778, 24826, 165034, 1105666, 7450978, 50450986, 343000474, 2340300946, 16018600978, 109951298746, 756592019914, 5217760843426, 36054083523778, 249557302572106, 1729973941999354, 12008256087645106
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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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G.f.: 1/(1-3*x) + 1/(1-6*x) + 1/(1-7*x).
E.g.f.: exp(3*x) + exp(6*x) + exp(7*x). (End)
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MATHEMATICA
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Table[3^n + 6^n + 7^n, {n, 0, 20}]
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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