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A004669
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Powers of 3 written in base 27.
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1
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1, 3, 9, 10, 30, 90, 100, 300, 900, 1000, 3000, 9000, 10000, 30000, 90000, 100000, 300000, 900000, 1000000, 3000000, 9000000, 10000000, 30000000, 90000000, 100000000, 300000000, 900000000, 1000000000
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n) = 3^(n mod 3)*10^floor(n/3). - M. F. Hasler, Jun 22 2018
a(n) = 10*a(n-3) for n > 2.
G.f.: (-9*x^2 - 3*x - 1)/(10*x^3 - 1). (End)
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MATHEMATICA
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Table[FromDigits[IntegerDigits[3^n, 27]], {n, 0, 100}] (* G. C. Greubel, Oct 12 2018 *)
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PROG
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(PARI) apply( a(n)=3^(n%3)*10^(n\3), [0..20]) \\ M. F. Hasler, Jun 22 2018
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CROSSREFS
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Cf. A000244, A004656, A004658, A004659, ..., A004668: powers of 3 in base 10, 2, 4, 5, ..., 26.
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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