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A074624
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a(n) = 8^n + 9^n.
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39
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2, 17, 145, 1241, 10657, 91817, 793585, 6880121, 59823937, 521638217, 4560526225, 39970994201, 351149013217, 3091621642217, 27274838966065, 241075504183481, 2134495165562497, 18928981513351817, 168109033806481105
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listen;
history;
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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/(1-8*x) + 1/(1-9*x).
E.g.f.: exp(8*x) + exp(9*x). (End)
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MAPLE
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MATHEMATICA
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Table[8^n + 9^n, {n, 0, 20}]
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PROG
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(SageMath) [8^n+9^n for n in range(31)] # G. C. Greubel, Mar 11 2023
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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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