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A061978
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Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 25 (most significant digit on right).
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143
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1, 3, 9, 21, 33, 57, 96, 864, 1033, 1661, 6449, 6624, 10464, 68249, 81664, 108981, 164384, 167571, 234311, 2420409, 5490464
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OFFSET
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1,2
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COMMENTS
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This sequence differs from A029542 in that all least significant zeros are kept during concatenation.
No more terms < 7*10^6.
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LINKS
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EXAMPLE
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MATHEMATICA
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b = 25; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[Reverse[IntegerDigits[#, b]], c], b], #] &] (* Robert Price, Mar 09 2020 *)
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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Larry Reeves (larryr(AT)acm.org), May 24 2001
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EXTENSIONS
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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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