A029524 Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 7 (most significant digit on right).

1, 3, 9, 12, 36, 96, 128, 2267, 4031, 29416, 551444, 2033727, 2056797, 2477144, 7974180, 9482385

Offset

1,2

Comments

This sequence differs from A061960 in that all least significant zeros are removed before concatenation.

No more terms < 10^7. [Lars Blomberg, Sep 07 2011]

Links

Table of n, a(n) for n=1..16.

Index entries for related sequences

Example

See A029519 for example.

Mathematica

b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[IntegerReverse[#, b], b], c], b], #] &] (* Robert Price, Mar 13 2020 *)

Crossrefs

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

Sequence in context: A261950 A366065 A137344 * A357726 A045769 A262539

Adjacent sequences: A029521 A029522 A029523 * A029525 A029526 A029527

Keyword

nonn,base

Author

Olivier Gérard

Extensions

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

a(12)-a(16) from Lars Blomberg, Sep 07 2011

Status

approved