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A074553
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a(n) = 3^n + 5^n + 8^n.
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1
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3, 16, 98, 664, 4802, 36136, 278498, 2177464, 17174402, 136190536, 1083566498, 8638939864, 68964148802, 550978111336, 4404154809698, 35214904015864, 281627607648002, 2252562882278536, 18018213594168098, 144134262724445464
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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/(1-5*x) + 1/(1-8*x).
E.g.f.: exp(3*x) + exp(5*x) + exp(8*x). (End)
a(n) = 16*a(n-1) - 79*a(n-2) + 120*a(n-3).
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MATHEMATICA
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Table[3^n + 5^n + 8^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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