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A029521 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 4 (most significant digit on right). 1
1, 3, 15, 969, 1107, 136193, 538019, 2177475, 2799315, 5948555 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence differs from A061957 in that all least significant zeros are removed before concatenation.

No more terms < 10^7. [Lars Blomberg, Sep 02 2011]

LINKS

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

Index entries for related sequences

EXAMPLE

See A029519 for example.

CROSSREFS

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

Sequence in context: A013408 A013412 A013410 * A272353 A012766 A012796

Adjacent sequences:  A029518 A029519 A029520 * A029522 A029523 A029524

KEYWORD

nonn,base

AUTHOR

Olivier Gérard

EXTENSIONS

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25 2002

a(8)-a(10) from Lars Blomberg, Sep 02 2011

STATUS

approved

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Last modified January 20 02:13 EST 2019. Contains 319320 sequences. (Running on oeis4.)