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A074619
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a(n) = 6^n + 7^n.
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7
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2, 13, 85, 559, 3697, 24583, 164305, 1103479, 7444417, 50431303, 342941425, 2340123799, 16018069537, 109949704423, 756587236945, 5217746494519, 36054040477057, 249557173431943, 1729973554578865, 12008254925383639
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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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MATHEMATICA
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Table[6^n + 7^n, {n, 0, 20}]
CoefficientList[Series[1/(1 - 6*x) + 1/(1 - 7*x), {x, 0, 20}], x] (* Vincenzo Librandi, Jan 11 2013 *)
LinearRecurrence[{13, -42}, {2, 13}, 30] (* Harvey P. Dale, Mar 30 2019 *)
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PROG
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CROSSREFS
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Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600-A074624.
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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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