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A061974 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 21 (most significant digit on right). 1
1, 5, 25, 125, 155, 160, 421, 1409, 729175, 2804576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence differs from A029538 in that all least significant zeros are kept during concatenation.

No more terms < 7*10^6. [Lars Blomberg, Jul 27 2011]

LINKS

Table of n, a(n) for n=1..10.

Index entries for related sequences

EXAMPLE

See A061955 for example.

CROSSREFS

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

Sequence in context: A036151 A271380 A036149 * A015950 A267780 A228736

Adjacent sequences:  A061971 A061972 A061973 * A061975 A061976 A061977

KEYWORD

nonn,base,more

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(9)-a(10) from Lars Blomberg, Jul 27 2011

STATUS

approved

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Last modified January 18 11:33 EST 2019. Contains 319271 sequences. (Running on oeis4.)