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A074622
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a(n) = 7^n + 8^n.
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3
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2, 15, 113, 855, 6497, 49575, 379793, 2920695, 22542017, 174571335, 1356217073, 10567261335, 82560763937, 646644824295, 5076269583953, 39931933598775, 314707907280257, 2484430327672455, 19642812107392433, 155514083261229015
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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/(1-7*x) + 1/(1-8*x).
E.g.f.: e^(7*x) + e^(8*x). (End)
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MATHEMATICA
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Table[7^n + 8^n, {n, 0, 20}]
LinearRecurrence[{15, -56}, {2, 15}, 20] (* Harvey P. Dale, Jun 08 2022 *)
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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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