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A086943
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Integers k such that R(k+7) = 3.
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5
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23, 293, 2993, 29993, 299993, 2999993, 29999993, 299999993, 2999999993, 29999999993, 299999999993, 2999999999993, 29999999999993, 299999999999993, 2999999999999993, 29999999999999993, 299999999999999993
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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a(n) = 3*10^n - 7.
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MATHEMATICA
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FromDigits/@Table[Join[{2}, Table[9, {n}], {3}], {n, 0, 20}] (* Harvey P. Dale, Aug 21 2011 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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