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A074558
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a(n) = 3^n + 7^n + 8^n.
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1
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3, 18, 122, 882, 6578, 49818, 380522, 2922882, 22548578, 174591018, 1356276122, 10567438482, 82561295378, 646646418618, 5076274366922, 39931947947682, 314707950326978, 2484430456812618, 19642812494812922, 155514084423490482
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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/(1-7*x) + 1/(1-8*x).
E.g.f.: exp(3*x) + exp(7*x) + exp(8*x). (End)
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MATHEMATICA
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Table[3^n + 7^n + 8^n, {n, 0, 20}]
LinearRecurrence[{18, -101, 168}, {3, 18, 122}, 20] (* Harvey P. Dale, Jan 21 2024 *)
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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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