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A029476
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Numbers k that divide the (left) concatenation of all numbers <= k written in base 7 (most significant digit on left).
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1
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1, 3, 15, 16, 29, 48, 75, 144, 477, 6211, 16053, 32688, 40431, 66313, 129825, 134224, 278064, 366064, 386863, 3157824, 4446069, 6697664, 8354233, 28775616, 33559488, 34107072, 38339136, 50059629, 50280080, 71693520, 113603184, 220308720, 247082832, 2637755936
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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15 is a term: 212016151413121110654321_7 = 59785983230307066720 = 15 * 3985732215353804448.
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MATHEMATICA
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b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[#, b], c], b], #] &] (* Robert Price, Mar 12 2020 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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More terms from 6211 from Andrew Gacek (andrew(AT)dgi.net), Feb 20 2000
More terms from Larry Reeves (larryr(AT)acm.org), Sep 29 2001
Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
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STATUS
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approved
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