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A051826
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Number of numbers below 10^n with nonzero multiplicative digital root 6.
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1
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1, 15, 213, 2337, 23231, 231651, 2349105, 23926057, 242539688, 2437578213, 24286001675, 240505616138, 2376317894981, 23497985025226, 232875555403623, 2312981893109766
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OFFSET
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1,2
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REFERENCES
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William Mayne, sci.math, Jun 15 1991
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LINKS
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FORMULA
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# { i : 10^(n-1) < i < 10^n and A051802(i)=6 }
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CROSSREFS
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KEYWORD
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nonn,base,hard
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AUTHOR
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STATUS
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approved
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