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A061934 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 5 (most significant digit on right). 1
1, 16, 19, 207, 350376, 723792, 853456, 1894016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence differs from A029498 in that all least significant zeros are removed before concatenation.

No more terms < 10^7. [Lars Blomberg, Oct 17 2011]

LINKS

Table of n, a(n) for n=1..8.

Index entries for related sequences

EXAMPLE

See A061931 for example.

MATHEMATICA

cat = 0; k = 1; lst = {}; While[k < 100000, c = FromDigits@ Reverse@ IntegerDigits[k, 5]; cat = cat*10^Floor[ Log10[c] + 1] + c; If[ Mod[ FromDigits[ IntegerDigits@ cat, 5], k] == 0, AppendTo[lst, k]; Print[k]]; k++]; lst (* Robert G. Wilson v, Oct 17 2011 *)

CROSSREFS

Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.

Sequence in context: A086121 A030402 A303813 * A195683 A199716 A163901

Adjacent sequences:  A061931 A061932 A061933 * A061935 A061936 A061937

KEYWORD

nonn,base

AUTHOR

Larry Reeves (larryr(AT)acm.org), May 24 2001

EXTENSIONS

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002

a(6)-a(8) from Lars Blomberg, Oct 17 2011

STATUS

approved

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Last modified October 18 15:41 EDT 2019. Contains 328162 sequences. (Running on oeis4.)